associated with radiation exposure from 64 slice computedtomography coronary angiography. JAMA ... Reflist 1 Medical imaging Category X ray computedtomography ar ... than catheter angiography and is a cost effective procedure. There is also less discomfort because ... Angiography Magnetic resonance angiography External links VIDEO http videos.med.wisc.edu videoInfo.php?videoid 160 CT Angiography , John Keevil, MD, speaks at the University of Wisconsin Cardiovascular ... more details
Interventions infobox Name Emission computedtomography Image Caption ICD10 ICD9 ICD9proc 92.0 ICD9proc 92.1 MeshID D014055 OPS301 OPS301 3 72 OPS301 3 75 OtherCodes Emission computedtomography is a type of tomography involving radioactive emissions. Types include positron emission tomography PET and Single photon emission computedtomography SPECT . The imaging agent used in SPECT emits gamma rays , as opposed to the positron emitters such as sup 18 sup F used in PET. There are a range of radiotracers such as sup 99m sup Tc, sup 111 sup In, sup 123 sup I, sup 201 sup Tl that can be used, depending on the specific application. Medical imaging medicine stub Category Tomography Category 3d nuclear medical imaging ... more details
cfr. Pavone, Fioranelli, Dowe ComputedTomography or Coronary Arteries, Springer 2009 . By comparison ... X ray computedtomography Category Cardiac imaging ... time, allowing excellent imaging of the coronary arteries cardiac CT angiography . Images with an even ... imaging can average less than the doses for conventional coronary angiography. Radiation Exposure Because the heart is effectively imaged more than once described above , cardiac CT angiography can result ... more details
Diagnostic infobox pawar Name Spiral computedtomography Image Caption ICD10 ICD9 MeshID D036542 OPS301 OtherCodes Spiral computedtomography is a computedtomography ref http cobweb.ecn.purdue.edu malcolm pct pct toc.html Avinash C. Kak and Malcolm Slaney 2001 . http www.ec securehost.com SIAM CL33.html Principles of Computerized Tomographic Imaging . http www.siam.org Society for Industrial and Applied Mathematics ISBN 978 0 898714 94 4 ISBN 0 89871 494 X. ref technology involving movement in a helical pattern for the purpose of increasing resolution. Most modern hospitals currently use spiral CT scanners. CT beam types have included parallel beams, fan beams, and cone beams. ref name Bovik2009 cite book author Alan Conrad Bovik title The essential guide to image processing url http books.google.com books?id 6TOUgytafmQC&pg PA743 accessdate 4 June 2011 year 2009 publisher Academic Press isbn 9780123744579 pages 743 ref SSCT and MSCT Willi Kalender , who is credited with the invention prefers the term Spiral scan CT, ref Willi Kalender Kalender WA 1994 . http www.semultrasoundctmri.com article S0887 2171 05 80091 5 abstract Technical foundations of spiral CT http www.semultrasoundctmri.com ... devices, developed in 1989, were called SSCT , for single slice spiral computedtomography . In 1998, MSCT or multi slice spiral computedtomography was introduced. ref name Cierniak2011 cite book author Robert Cierniak title X Ray ComputedTomography in Biomedical Engineering url http books.google.com ... isbn 9780857290267 pages 31 ref Helical or spiral cone beam computedtomography See Cone beam computedtomography In cone beam computedtomography commonly abbreviated CBCT , the x ray beam is conical. ref MeshName Helical Cone Beam CT ref Helical or spiral cone beam computedtomography is a type of three dimensional computedtomography CT in which the source usually of x ray s describes a helix ... imaging Respiratory system procedures Use dmy dates date June 2011 Category X ray computedtomography ... more details
Diagnostic infobox Name Computedtomography of the head Image Computedtomography of human brain large.png Caption Computer tomography of human brain, from base of the skull to top. Taken with intravenous contrast medium. ICD10 ICD9 ICD9proc 87.03 MeshID OPS301 OPS301 3 200 , OPS301 3 220 OtherCodes Computedtomography CT of the head or Computed Axial Tomography CAT scanning uses a series of x rays of the head taken from many different directions. Typically used for quickly viewing Acquired brain injury brain injuries , CT scanning uses a computer program that performs a numerical integral calculation the inverse Radon transform on the measured x ray series to estimate how much of an x ray beam is absorbed in a small volume of the brain. Typically the information is presented as cross sections of the brain. ref Malcom Jeeves 1994 . Mind Fields Reflections on the Science of Mind and Brain . Grand Rapids, MI Baker Books., p. 21 ref In approximation, the denser a material is, the whiter a volume of it will appear on the scan just as in the more familiar flat X rays . CT scans are primarily used for evaluating swelling from tissue damage in the brain and in assessment of ventricle size. Modern CT scanning can provide reasonably good images in a matter of minutes. Computedtomography CT has become the diagnostic modality of choice for head trauma due to its accuracy, reliability, safety, and wide availability. The changes in microcirculation, impaired auto regulation, cerebral edema, and axonal injury start as soon as head injury occurs and manifest as clinical, biochemical, and radiological changes. Proper therapeutic management of brain injury is based on correct diagnosis and appreciation of the temporal course of the disease process. CT scan detects and precisely localizes ... Thieme isbn 9783131081315 pages 538 ref See also Neuroimaging Commons category Computedtomography images of the brain References reflist Neuro procedures Medical imaging Category X ray computedtomography ... more details
No footnotes article date April 2009 ComputedTomography Laser Mammography CTLM is the trademark of Imaging Diagnostic Systems, Inc. IDSI, USA for its Optical tomography optical tomographic technique for female breast imaging. This medical imaging technique uses laser energy in the near infrared region of the spectra, to detect angiogenesis in the breast tissue. It is optical molecular imaging for hemoglobin both oxygenated and deoxygenated. The technology uses laser in the same way computedtomography uses X Rays, these beams travel through tissue and suffer attenuation. A laser detector measures the intensity drop and the data is collected as the laser detector moves across the breast creating a tomography image. CTLM images show hemoglobin distribution in a tissue and can detect areas of Angiogenesis surrounding malignant tumors, that stimulate this angiogenesis to obtain nutrients for growth. References http www.imds.com products ctlm CTLM section on Imaging Diagnostic Systems website http scholar.google.com scholar?hl en&lr &q 22computed tomography laser mammography 22&btnG Search CTLM on Google Scholar http nersp.nerdc.ufl.edu nikos Downloads SPIE Opt Mammo.pdf Grable R.J. and others. Optical computedtomography for imaging the breast first look Proc. SPIE, 2000, Vol. 4082, p. 40 45. http www.appliedradiology.com articles pdf v0029i02 5C00801788 5Cmain.pdf Grable R. and others. Optical mammography Applied Radiology, 2001, Vol. 29, No. 2, p. 18 20. Medical imaging Breast procedures Category Optical imaging Category Laser medicine ... more details
Interventions infobox Name PAGENAME Image Caption ICD10 ICD9unlinked ICD9proc 88.98 MeshID OPS301 OtherCodes In medicine , peripheral quantitative computed tomography , commonly abbreviated pQCT , is a type of quantitative property quantitative computed tomography QCT , used for making measurements of the bone mineral density BMD in a peripheral part of the body. It is useful for measuring bone strength. ref cite journal author M ller A, R egsegger E, R egsegger P title Peripheral QCT a low risk procedure to identify women predisposed to osteoporosis. journal Phys Med Biol volume 34 issue 6 pages 741 9 year 1989 pmid 2740441 doi 10.1088 0031 9155 34 6 009 ref Comparison to DXA Unlike most other common techniques for measuring BMD, a pQCT scan is able to measure volumetric bone mineral density, plus other measures such as the stress strain index SSI and the geometry of the bone. DXA is only able to provide the areal bone mineral density. See also Dual energy X ray absorptiometry DXA References references medical stub Medical imaging Operations and other procedures on the musculoskeletal system Category X ray computed tomography ar de Knochendichtemessung fr Ost odensitom trie he pl Densytometria kostna ... more details
Orphan date July 2009 The computedtomography dose index CTDI is a commonly used radiation exposure index in Computedtomography X ray computedtomography and is reported by the CT manufacturers to scan personnel for each exam. Definitions It is defined by the US Department of Health and Human Services HHS as the average dose imparted by a single axial acquisition to a standard 100 mm pencil chamber dosimeter inside a PMMA phantom over the width of 14 CT slices math CTDI frac 1 nT int 7T 7T D z dz math where math n math is the number of slices acquired, math T math is the slice thickness and math D z math is the radiation dose measured at position math z math along the scanner s main axis. This equation is often used in a modified form math CTDI 100 frac 1 nT int 50 mm 50 mm D a z dz math . The dose absorbed in air math D a z math can be conveniently assessed with a 100 mm standard pencil dose chamber. Typically, the dose distribution within the body cross section imparted by a CT scan is much more homogeneous than that imparted by radiography, but in still somewhat larger near the skin than in the body center. Therefore, a third measure, the weighted CTDI was introduced math CTDI w frac 1 3 CTDI 100 central frac 2 3 CTDI 100 peripheral . math Similar measures with yet wider chambers are useful for CT systems with large numbers of detector rows. ref refGeleijns2009 Geleijns 2009 ref Notes reflist 2 References cite id refRothenberg2000 Rothenberg, LN and Pentlow, KS 2000 . CT dosimetry and radiation safety , Categorical Course in Diagnostic Radiology Phyics CT and US Cross sectional Imaging, LW Goldman and JB Fowlkes, eds., pp171 188, RSNA, Oak Brook, IL cite cite id refGeleijns2009 J Geleijns, M Salvad Artells, P W de Bruin, R Mather, Y Muramatsu and M F McNitt Gray 2009 . Computedtomography dose assessment for a 160 mm wide, 320 detector row, cone beam CT scanner , Phys. Med. Biol. 54, pp3141 3159 cite Category X ray computedtomography de CTDI fr CTDI ... more details
. ref name Hatch Hatcher, DC. u Operational principles for cone beam computedtomography u . JADA 2010 ... 2D radiography cannot. ref Mah, JK et al. u Practical applications of cone beam computedtomography ... to X ray computedtomography medical grade CT scans , can provide an accurate absolute density ... multislice vs cone beam computedtomography u . Am J Orthod Dentofacial Orthop 2006 130 410 416 ... Deriving Hounsfield units using grey levels in cone beam computedtomography u . Dentomaxillofacial ... for improved area detectors, ref Vannier, MW. u Craniofacial computedtomography scanning technology ... De Vos, W et al. u Cone beam computerized tomography CBCT imaging of the oral and maxillofacial ... of bone density using the computerized tomography scan u . Clin Oral Implants Res 2001 12 79 84. ref ... this method in vivo . ref name MAH References reflist Medical imaging DEFAULTSORT Cone Beam ComputedTomography Category Dentistry de Digitale Volumentomographie fa ... more details
Orphan date September 2011 Neutron stimulated emission computedtomography NSECT uses induced gamma emission through neutron inelastic scattering to generate image s of the spatial distribution of Chemical element element s in a Sample material sample . ref cite journal last Kapadia first Anuj title Neutron Stimulated Emission ComputedTomography A new spectroscopic technique journal Neutron Imaging and Applications year 2009 pages 265 288 ref NSECT mechanism A given atomic nucleus , defined by its Proton number proton and neutron number s, is a Quantization physics quantized system with a Nuclear shell model set of characteristic higher energy levels that it can occupy as a nuclear isomer . When the nucleus in its ground state is struck by a Fast neutron Fast neutrons fast neutron with kinetic energy greater than that of its first excited state, it can undergo an isomeric transition to one of its excited state s by receiving the necessary energy from the Fast neutron Fast neutrons fast neutron through Inelastic scattering inelastic scatter . Promptly on the order of picosecond s, on average ref cite web title Isomeric transition url http en.wikipedia.org wiki Isomeric transition work Wikipedia accessdate 08 03 2011 ref after excitation, the excited nuclear isomer de excites either directly or through a series of cascades to the ground state, emitting a characteristic Gamma rays ... emission computedtomography for diagnosis of iron overload Simulations in GEANT4 year 2007 ... Neutron Stimulated Emission ComputedTomography for Diagnosis of Breast Cancer journal IEEE Transactions ... to neutron stimulated emission computedtomography, Physics in medicine and biology. 51 3375. 2006 ... AJ. Neutron stimulated emission computedtomography a Monte Carlo simulation approach, Physics ..., AJ, et al. Neutron stimulated emission computedtomography of a multi element phantom, Physics ... of the distribution of the nuclei in the sample can be reconstructed as done in tomography ... more details
Interventions infobox Name Single photon emission computedtomography Image SPECT Slice of Brain using Tc 99m Ceretec.jpg Caption A SPECT slice of the distribution of 99m Tc Ceretec within a patient s brain. ICD10 ICD9 ICD9proc 92.0 ICD9proc 92.1 MeshID D015899 OPS301 OPS301 3 72 OtherCodes Single photon emission computedtomography SPECT, or less commonly, SPET is a nuclear medicine tomography tomographic ref MeshName SPECT ref imaging technique using gamma rays . It is very similar to conventional nuclear medicine planar imaging using a gamma camera . However, it is able to provide true 3D information. This information is typically presented as cross sectional slices through the patient, but can be freely reformatted or manipulated as required. The basic technique requires injection of a gamma emitting radioisotope called radionuclide into the bloodstream of the patient. On occasion, the radioisotope is a simple soluble dissolved ion, such as a radioisotope of gallium III , which happens to also have chemical properties that allow it to be concentrated in ways of medical interest for disease detection. However, most of the time in SPECT, a marker radioisotope, which is of interest ... obtained from other tomographic techniques, such as MRI , Computedtomography CT , and Positron emission tomography PET . SPECT is similar to PET in its use of radioactive tracer material and detection ... X ray Computedtomography CT scanner. As X ray CT images are an attenuation map of the tissues .... DOI 10.1016 S0074 7742 05 67011 0 External links Commons category Single photon emission computedtomography ... Nuclear technology Medical imaging DEFAULTSORT Single Photon Emission ComputedTomography ... 99m sup Tc HMPAO SPECT scanning competes with fludeoxyglucose FDG Positron emission tomography PET scanning ... Functional neuroimaging Magnetic resonance imaging Positron emission tomography ISAS Ictal Interictal ... Gabor T. authorlink Gabor Herman title Fundamentals of Computerized Tomography Image Reconstruction ... more details
such as Computedtomographyangiography CT angiography and Magnetic resonance angiography MR angiography . The term isotope angiography has also been used, although this more correctly is referred to as Perfusion ... to the director, William Friedkin . See also Cardiac catheterization ComputedTomographyAngiography ...Interventions infobox Name PAGENAME Image Cerebral angiography, arteria vertebralis sinister injection.JPG ... 88.68 OPS301 OPS301 3 60 MeshID D000792 OtherCodes Angiography or arteriography is a medical imaging ... 8601060680 1 bleeding arteries angiography accessdate 12 September 2011 author G. Timothy Johnson, M.D work Chicago Tribune date 1986 01 23 ref The term angiography is strictly defined as based ... to provide contrasted x ray cerebral angiography in order to diagnose several kinds of nervous ... using a technique called digital subtraction angiography DSA . Images in this case are usually taken ... 350 Catheterization Lab Catheterization in selective angiography Uses File Angiome annulaire.JPG thumb Finger angioma Coronary angiography main Coronary angiography One of most common angiograms ... vascular angiography Another increasingly common angiographic procedure is neuro vascular digital subtraction angiography in order to visualise the arterial and venous supply to the brain. Intervention .... Peripheral angiography main Peripheral artery occlusive disease Angiography is also commonly ... degeneration . Complications Coronary angiography Coronary angiographies are common and major complications ... to the heart from the catheter rare and allergic reaction to the contrast. ref name nhs angiography complications cite web url http www.nhs.uk Conditions Angiography Pages Complications.aspx title Angiography Complications accessdate 2010 03 24 date 2009 06 01 work Health A Z publisher NHS Choices ref Cerebral angiography Major complications in Cerebral Angiography are also rare but include ... occur but is rare. ref name nhs angiography complications Additional Risks The contrast medium that is used ... more details
rely on using simultaneously integrated physical phenomena, e.g. X rays for both computedtomography CT and angiography , combined computedtomography CT MRI and combined computedtomography CT Positron Emission Tomography PET . The term volume imaging might subsume these technologies more accurately than the term tomography . However, in the majority of cases in clinical routine, staff request ... style text align center X ray s computedtomography CT style text align center gamma ray s SPECT style ... Atom probe APT ComputedTomography Imaging Spectrometer ref Ralf Habel, Michael Kudenov, Michael ... Positron emission tomographycomputedtomography Positron emission & X ray PET CT Quantum tomography Quantum state Single photon emission computedtomography Gamma ray SPECT Seismic tomography Seismic ...File TomographyPrinciple Illustration.png 200px thumb Basic principle of tomography superposition free tomographic cross sections S sub 1 sub and S sub 2 sub compared with the projected image P Tomography ... used in tomography is called a tomograph , while the image produced is a tomogram . The method ... or section , representing the idea of a section , a slice or a cutting . A tomography of several sections of the body is known as a polytomography. Etymology The word tomography is derived from the Greek tomos part and graphein to write . Description In conventional medical X ray tomography, clinical ... in other planes appear blurred. ref MeshName Tomography ref By modifying the direction and extent ... term for tomography. ref cite journal title Experiences with Planography first B. last Pollak ... issn 0012 3692 accessdate July 10, 2011 ref Modern tomography More modern variations of tomography ... of computerized tomography Image reconstruction from projection, 2nd edition, Springer, 2009 ref Different ... annihilation Positron emission tomography PET style text align center electron s Electron tomography ... on more advanced volume visualization techniques, the terms tomography tomogram may go out of fashion ... more details
Pulmonary angiography or pulmonary arteriography is a cardiology cardiological medicine medical procedure. Pulmonary blood vessel s are X ray Medical uses x rayed to detect arteriovenous malformation s. Direct angiography is the injection of radiocontrast into the circulation with subsequent fluoroscopy direct X ray visualisation of the lungs. A more common form of direct angiography, is the catheterisation of the right atrium of the heart and injection of radiocontrast into the right heart. A popular form of pulmonary angiography is computedtomography pulmonary angiography CTPA . This involves venous contrast only. Invasive pulmonary angiography was first performed in 1931 by Egas Moniz and colleagues. ref cite journal author Moniz E, Carvalho L, Lima A title Angiopneumographie journal Presse Med year 1931 volume 39 pages 996 99 ref Robb and Steinberg described pulmonary angiography by infusion of peripheral radiocontrast. ref cite journal author Robb GP, Steinberg I title A practical method of visualization of the chambers of the heart, the pulmonary circulation, and the great blood vessels in man journal J Clin Invest year 1938 volume 17 pages 507 pmc 434806 doi 10.1172 JCI100977 ref ref http books.google.co.uk books?id Mgl9G8oU1IkC&pg PA566 ref References reflist 2 External links http www.human body.org anatomical glossary 28 angiography pulmonary.html Referencing site for great detail on Pulmonary angiography Pulmonary angiography http www.nlm.nih.gov medlineplus ency article 003813.htm Pulmonary angiography MedlinePlus Medical Encyclopedia Category Cardiology treatment stub Medical imaging Category Projectional radiography pt Angiografia pulmonar ... more details
Refimprove date December 2009 Interventions infobox Name PAGENAME Image Cerebral angiography, arteria vertebralis sinister injection.JPG Caption Cerebral angiogram showing a Transverse plane transverse projection of the vertebral artery vertebro basilar artery basilar and posterior cerebral circulation. ICD10 ICD9 ICD9proc 88.41 MeshID D002533 OtherCodes Cerebral angiography is a form of angiography which provides images of blood vessels in and around the brain, thereby allowing detection of abnormalities such as arteriovenous malformation s and aneurysm s. It was pioneered in 1927 by the Portuguese physician Egas Moniz at the University of Lisbon , who also helped develop thorotrast for use in the procedure. ref Tondreau, R. 1985 Egas Moniz 1874 1955. Radiographics, 5 6 994 997 ref Typically a catheter is inserted into a large artery such as the femoral artery and threaded through the circulatory system to the Common carotid artery carotid artery , where a contrast agent is injected. A series of radiograph s is taken as the contrast agent spreads through the brain s arterial system, then a second series as it reaches the venous system. For some applications Citation needed date December 2009 this method may yield better images than less invasive methods such as computedtomographyangiography and magnetic resonance angiography . In addition, cerebral angiography allows certain treatments to be performed immediately, based on the its findings. If, for example, the images reveal an aneurysm , metal coils may be introduced through the catheter already in place and maneuvered to the site of aneurysm over time these coils encourage formation of connective tissue at the site, strengthening the vessel walls. In some jurisdictions, cerebral angiography is required to confirm brain death . Citation needed date December 2009 See also Angiography References Reflist Vascular procedures Neuro procedures DEFAULTSORT Cerebral Angiography Category Projectional radiography Category ... more details
Rotational Angiography Rotational angiography is a medical imaging technique based on x ray , that allows to acquire X ray computedtomography CT like 3D volumes during hybrid operating room hybrid surgery or during a catheter intervention using a fixed C Arm . The fixed C Arm thereby rotates around the patient and acquires a series of x ray images that are then reconstructed through software algorithms into a 3D image. ref name hartkens cite journal last Hartkens first Thomas coauthors Riehl, Lisa Altenbeck, Franziska Nollert, Georg title Zuk nftige Technologien im Hybrid OP journal Tagungsband zum Symposium Medizintechnik Aktuell , 25. 26.10.2011 in Ulm, Germany year 2011 series Fachverband Biomedizinische Technik pages 25 29 ref Synonyms for rotational angiography include flat panel volume CT ref name guptarsna and cone beam CT ref name hartkens . Commercial names include DynaCT https www.medical.siemens.com webapp wcs stores servlet ProductDisplay q catalogId e 11 a catTree e 100010,1007660,12751,1013265 a langId e 11 a productId e 175741 a storeId e 10001.htm Siemens AG and XPerCT ... pmid ref Clinical applications 3D angiography or Rotational Angiography is used in interventional ... hyphenation rules and is probably invalid . ref CT versus Rotational Angiography Classically ... CT and rotational angiography depends on several factors. The patient positioning on the CT scanner ... from the heart center in Leipzig suggests that intraoperative 3D imaging with rotational angiography ... or on an interoperative 3D image acquired by rotational angiography. The CT image is usually acquired ...?option com docman&task doc download&gid 1107 work 3D guided angiography ... bring the future into your ... accessdate 17 February 2012 ref Image quality can differ between rotational angiography and CT images ..., the spatial resolution of flat panel volume CT rotational angiography using a C Arm is much ... in attenuation from the background being 5 HU with flat panel volume CT rotational angiography ... more details
disease, fluorescein angiography can detect diabetic retinopathy , vein occlusions, retinal artery occlusion s, edema of the optic disc, and tumors. Other types of fluorescent angiography Indocyanine green angiography Sources Richard, Gisbert Fluorescein and ICG Angiography , THIEME 1998, ISBN ... medlineplus ency article 003846.htm Fluorescein angiography in Medical Encyclopedia See also Fundus ... more details
taken over by computedtomographyangiography CTA , which can produce 3D images through a test which ... subtraction angiographyAngiography Contrast medium Image intensifier ComputedtomographyangiographyComputedTomographyAngiography CTA Peripheral artery occlusive disease External links http ... more details
Neutron tomography is a form of computedtomography involving the production of three dimensional images by the detection of the absorbance of neutrons produced by a neutron source . ref cite pmid 15246387 ref It created a three dimensional image of an object by combining multiple planar images with a known separation. ref http mnrc.ucdavis.edu tomography.html McClellan Nuclear Radiation Center Bot generated title ref It has a resolution of around 200&ndash 500 &mu m. ref cite web url http neutra.web.psi.ch What tomo.html title Neutron Tomography work Paul Scherrer Institut ref Whilst its resolution is lower than that of X ray tomography, it can be useful for specimens containing low contrast between the matrix and object of interest for instance, fossils with a high carbon content, such as plants or vertebrate remains. ref name Sutton2008 Cite doi 10.1098 rspb.2008.0263 ref Neutron tomography can have the unfortunate side effect of leaving imaged samples radioactive if they contain appreciable levels of certain elements. ref name Sutton2008 See also cite doi 10.2138 rmg.2006.63.17 cite journal author Schwarz, D. year 2005 issue 30 url http palaeo electronica.org 2005 2 neutron neutron.pdf author2 Vontobel, P. L., Eberhard, H., Meyer, C. A. & Bongartz, G. title Neutron tomography of internal structures of vertebrate remains a comparison with X ray computedtomography journal Paleontol. Electronica volume 8 format PDF References reflist Category Tomography optics stub ... more details
Process tomography 1 consists of tomography tomographic imaging of systems, such as process pipes in industry. In tomography the Three dimensional space 3D distribution of some physical quantity in the object is determined. There is a widespread need to get tomographic information about process. This information can be used, for example, in the design and control of processes. Tomography involves taking measurements around the periphery of an object e.g. process vessel or patient to determine what is going on inside. The best known technique is CAT scanning in medicine , however process tomography instrumentation needs to be cheaper, faster and more robust. Many different imaging methods are used in process tomography, e.g. Medical ultrasonography ultrasonic imaging , positron emission tomography PET , electrical resistance tomography ERT and electrical impedance tomography EIT , electrical capacitance tomography ECT , magnetic induction tomography MIT . In all cases external sensors are used to detect signals from boundary of the object, and the three dimensional material distribution or the velocity field is computed using the measured data. Process tomography is an area of rapid growth both in terms of research and applications. There are number of challenges remaining in this area including data processing an image reconstruction 2 , and application of imaging modalities in a real applications. References reflist York, T., 2001. Status of electrical tomography in industrial applications, Journal of Electronic Imaging Soleimani, M., 2008. Computational aspects of low frequency electrical and electromagnetic tomography A review study. International Journal of Numerical Analysis and Modeling, 5 3 , pp. 407 440. DEFAULTSORT Process Tomography Category Imaging ... more details
Computed radiography CR uses very similar equipment to conventional Radiography Industrial radiography radiography except that in place of a film to create the image, an imaging plate IP made of photostimulable phosphor is used. The imaging plate housed in a special cassette and placed under the body part or object to be examined and the x ray exposure is made. Hence, instead of taking an exposed film into a darkroom for developing in chemical tanks or an automatic film processor, the imaging plate is run through a special laser scanner, or CR reader, that reads and digitizes the image. The digital image can then be viewed and enhanced using software that has functions very similar to other conventional digital image processing software, such as contrast, brightness, filtration and zoom. Differences from Direct Radiography File CRSCanner.png right thumb CeReO Computed Radiography Scanner Computed radiography CR is often distinguished from Direct Radiography DR . CR and DR have many similarities. Both CR and DR use a medium to capture x ray energy and both produce a digital image that can be enhanced for soft copy diagnosis or further review. Both CR and DR can also present an image ... applications Common applications for computed radiography include corrosion surveys on pipes ... on all size piping File Crapared.jpg right thumb Medical applications Computed Radiography systems ... images can be stored digitally. Computed radiography often requires fewer retakes due to under ... replacement. See also Digital radiography References http www.willick.com computed radiography.htm ... article wcndt2004 pdf radiography 367 deprins.pdf Computed Radiography in NDT Applications http www.ndt.net ... de products xray products radiography computed s index.wpd Philips Medical http www.medical.siemens.com ... http www.fujifilm.com products medical products computed radiography capsula x Fujifilm http www.agfa.com ... testing fr Computed Radiography it Radiografia digitale ja X zh ... more details
2000, has been the development of systems for fluorescence tomography of tissue. In these systems ... through the tissue, and so many of the fluorescence tomography systems do not require the use ... tomography has been in the realm of pre clinical cancer research. Both commercial systems and academic ..., and tracking response to therapies. Optical tomography found its application in industry as a sensor ... LLC , Proc. SPIE 7064, 70640A 2008 doi 10.1117 12.797541 ref . See also Optical coherence tomography Diffuse optical imaging Computedtomography laser mammography References reflist External links http www.imperial.ac.uk research photonics research topics tomog tomog.htm Optical tomography at Imperial College, London http www.medphys.ucl.ac.uk research borl index.htm Optical tomography at University ... more details
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