Eisenberg: Comprehensive Radiographic Pathology, 5th Edition
... SPECT, or PET to create a single set of images using software. The basic technique of MRI consists of inducing hydrogen atoms (protons) to alternate between a high-energy state and a low-energy state by absorbing and then releasing, or transferring, energy. Gamma-emitting radionuclides are detected ...
... SPECT, or PET to create a single set of images using software. The basic technique of MRI consists of inducing hydrogen atoms (protons) to alternate between a high-energy state and a low-energy state by absorbing and then releasing, or transferring, energy. Gamma-emitting radionuclides are detected ...
Techniques to lower CT dose
... “FDA is advocating the universal adoption of two principles of radiation protection: appropriate justification for ordering each procedure, and careful optimization of the radiation dose used during each procedure. Each patient should get the right imaging exam, at the right time, with the right rad ...
... “FDA is advocating the universal adoption of two principles of radiation protection: appropriate justification for ordering each procedure, and careful optimization of the radiation dose used during each procedure. Each patient should get the right imaging exam, at the right time, with the right rad ...
MR Imaging of Acute Experimental Ischemia in Cats
... less than 22 hr old (fig. 3). These three animals showed low signal intensity on the short TR sequences in the involved tissue. The paucity of data on old infarcts prevents any significant correlation between age of infarction and degree of T1, T2 value change. Postmortem examination of the cat brai ...
... less than 22 hr old (fig. 3). These three animals showed low signal intensity on the short TR sequences in the involved tissue. The paucity of data on old infarcts prevents any significant correlation between age of infarction and degree of T1, T2 value change. Postmortem examination of the cat brai ...
The Advanced Modalities ~ Computed
... a specific tissue. • Helical (spiral): The gantry rotates 360 degrees around the patient as the table moves through it continuously, rather than taking one slice at a time. • Multidetector CT: A scanner that has more than one detector (up to 64) and thus can obtain more than one image (or slice) at ...
... a specific tissue. • Helical (spiral): The gantry rotates 360 degrees around the patient as the table moves through it continuously, rather than taking one slice at a time. • Multidetector CT: A scanner that has more than one detector (up to 64) and thus can obtain more than one image (or slice) at ...
Targeted molecular imaging in oncology
... (t1/2 = 6 hr, 140 keV) is used for SPECT and 68Ga (t1/2 = 68 min, 511 keV) for PET. Molecular targets labeled with Tc-99m and Ga-68 can be utilized for prediction of therapeutic response, monitoring tumor response to treatment and differential diagnosis. Molecular targets for oncological research in ...
... (t1/2 = 6 hr, 140 keV) is used for SPECT and 68Ga (t1/2 = 68 min, 511 keV) for PET. Molecular targets labeled with Tc-99m and Ga-68 can be utilized for prediction of therapeutic response, monitoring tumor response to treatment and differential diagnosis. Molecular targets for oncological research in ...
Optimising patient dose The right dose of expertise
... up to date, and to make a significant change in the dose required. Whenever possible, cesium-based detectors in combination with MUSICA should be used to minimise dose and achieve optimum image quality. We are committed to being your imaging solution provider for life. (*) Testing with board-certifi ...
... up to date, and to make a significant change in the dose required. Whenever possible, cesium-based detectors in combination with MUSICA should be used to minimise dose and achieve optimum image quality. We are committed to being your imaging solution provider for life. (*) Testing with board-certifi ...
SPR Practice Parameter for the Performance of Skeletal Scintigraphy
... images, and/or SPECT or SPECT/CT images of specific regions of interest. SPECT or SPECT/CT of the spine may be helpful in patients with unexplained back pain, and for better characterization of spine lesions detected on planar images. If limited images of the appendicular skeleton are acquired, care ...
... images, and/or SPECT or SPECT/CT images of specific regions of interest. SPECT or SPECT/CT of the spine may be helpful in patients with unexplained back pain, and for better characterization of spine lesions detected on planar images. If limited images of the appendicular skeleton are acquired, care ...
Medical Imaging
... who called them X rays because their nature was at first unknown; they are sometimes also called Roentgen, or Röntgen, rays. X-ray line spectra were used by H. G. J. Moseley in his important work on atomic numbers (1913) and also provided further confirmation of the quantum theory of atomic structur ...
... who called them X rays because their nature was at first unknown; they are sometimes also called Roentgen, or Röntgen, rays. X-ray line spectra were used by H. G. J. Moseley in his important work on atomic numbers (1913) and also provided further confirmation of the quantum theory of atomic structur ...
Pneumonectomy
... o No breath sounds (although there may be bronchial breathing in the upper zone due to tracheal deviation ...
... o No breath sounds (although there may be bronchial breathing in the upper zone due to tracheal deviation ...
myocardial viability- assessment and clinical relevance
... with chronic coronary artery disease and left ventricular dysfunction, there exists an important subpopulation in which revascularization may significantly improve regional or global left ventricular function, as well as symptoms and hence therapeutic and prognostic benefits in selected patients. Th ...
... with chronic coronary artery disease and left ventricular dysfunction, there exists an important subpopulation in which revascularization may significantly improve regional or global left ventricular function, as well as symptoms and hence therapeutic and prognostic benefits in selected patients. Th ...
diagnostic imaging report
... the evaluation of this literature synthesis. In essence, the AGREE instrument is used to provide a tool for assessing the quality of clinical practice guidelines. All authors and the CCGPP were in agreement that this was the appropriate instrument to be used. The AGREE instrument is available at: ht ...
... the evaluation of this literature synthesis. In essence, the AGREE instrument is used to provide a tool for assessing the quality of clinical practice guidelines. All authors and the CCGPP were in agreement that this was the appropriate instrument to be used. The AGREE instrument is available at: ht ...
Cardiovascular Imaging With Computed Tomography
... shift the risk-benefit ratio and subsequently have an impact on appropriateness criteria. However, the relatively noninvasive nature of a test alone does not establish its usefulness for screening, in particular because false positives in patients with low pre-test probability can be associated with ...
... shift the risk-benefit ratio and subsequently have an impact on appropriateness criteria. However, the relatively noninvasive nature of a test alone does not establish its usefulness for screening, in particular because false positives in patients with low pre-test probability can be associated with ...
Purpose: To use diffusion tensor imaging (DTI) to visualize
... reference (TR/TE, 641/10; flip angle 90 degrees; field of view, 128 mm; number of signal averages(NSA) of 2. Next, single-shot spin-echo echo-planar DTI sequences were performed with parameters: TR/TE, 5300/69; flip angle 90 degrees; field of view 16 cm; matrix size 128 x 128; 2 NSA ; slice thicknes ...
... reference (TR/TE, 641/10; flip angle 90 degrees; field of view, 128 mm; number of signal averages(NSA) of 2. Next, single-shot spin-echo echo-planar DTI sequences were performed with parameters: TR/TE, 5300/69; flip angle 90 degrees; field of view 16 cm; matrix size 128 x 128; 2 NSA ; slice thicknes ...
Computer Tomography
... attenuation coefficients, expressed in Hounsfield units. There are currently 7 generations of CT scanner design, which depend on the relation between the x-ray source and detectors, and the extent and motion of the detectors (and patient bed). The basic imaging equation is identical to that for proj ...
... attenuation coefficients, expressed in Hounsfield units. There are currently 7 generations of CT scanner design, which depend on the relation between the x-ray source and detectors, and the extent and motion of the detectors (and patient bed). The basic imaging equation is identical to that for proj ...
Myocardial Perfusion Imaging With Rb-82 PET
... ventricular ejection function (LVEF), myocardial perfusion, wall motion, and wall thickening. Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are two modalities that can be used to quantify the left global and regional perfusion at rest and stress. While PET ...
... ventricular ejection function (LVEF), myocardial perfusion, wall motion, and wall thickening. Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are two modalities that can be used to quantify the left global and regional perfusion at rest and stress. While PET ...
Cancer Imaging With Fluorine-18–Labeled Choline Derivatives
... American men older than 50 years of age. Clinically, there has been a long-standing need for better imaging methods that can be applied to diagnose, risk stratify, stage, and direct treatments for prostate cancer. Conventional 18F-fluorodeoxyglucose (FDG)-PET has proven to be of limited usefulness f ...
... American men older than 50 years of age. Clinically, there has been a long-standing need for better imaging methods that can be applied to diagnose, risk stratify, stage, and direct treatments for prostate cancer. Conventional 18F-fluorodeoxyglucose (FDG)-PET has proven to be of limited usefulness f ...
SPECT/CT Imaging- Physics and g g y Instrumentation Issues
... of SPECT/CT- SPECT • Radionuclide(s) which emits one or more discrete energy photons. • Collimators – match radionuclide – need to be changed. • Camera Heads – Keep close while circling patient for best imaging. • Variable angle bet between een camera heads. • Speed of rotation is limited for CT if ...
... of SPECT/CT- SPECT • Radionuclide(s) which emits one or more discrete energy photons. • Collimators – match radionuclide – need to be changed. • Camera Heads – Keep close while circling patient for best imaging. • Variable angle bet between een camera heads. • Speed of rotation is limited for CT if ...
Description and Implementation of a Quality - QIBA Wiki
... reconstruction kernels were selected to avoid edge enhancement processes that have been shown to artificially ...
... reconstruction kernels were selected to avoid edge enhancement processes that have been shown to artificially ...
Radiology Rounds - August 2011
... MRI MRI image quality is least affected by obesity although increased body habitus introduces noise and the large field of view needed decreases the in-plane resolution of the images. The main limitations of MRI are the size of the bore and the table weight limits, which prevent imaging of large pat ...
... MRI MRI image quality is least affected by obesity although increased body habitus introduces noise and the large field of view needed decreases the in-plane resolution of the images. The main limitations of MRI are the size of the bore and the table weight limits, which prevent imaging of large pat ...
this PDF file
... within the last two months • If the patient is taking medications or ingesting other substances that contain iodine, including kelp, seaweed, cough syrups, multivitamins or heart medications. A few days prior to the examination, blood tests may be performed to measure the level of thyroid hormones i ...
... within the last two months • If the patient is taking medications or ingesting other substances that contain iodine, including kelp, seaweed, cough syrups, multivitamins or heart medications. A few days prior to the examination, blood tests may be performed to measure the level of thyroid hormones i ...
Computed Tomography Angiography (CTA) and Magnetic
... than with conventional angiography Less costly than catheter angiography No exposure to ionizing radiation Use of contrast is not necessary to obtain good images ...
... than with conventional angiography Less costly than catheter angiography No exposure to ionizing radiation Use of contrast is not necessary to obtain good images ...
Improving Orthodontic Diagnosis and Treatment with i
... Certification for Compatibility with SureSmile® Technology The i-CAT® is the only cone beam 3-D unit certified for seamless integration with SureSmile® technology, which transforms cone beam scans of the mouth and teeth into 3-D computer models for orthodontic treatment planning and treatment. Ortho ...
... Certification for Compatibility with SureSmile® Technology The i-CAT® is the only cone beam 3-D unit certified for seamless integration with SureSmile® technology, which transforms cone beam scans of the mouth and teeth into 3-D computer models for orthodontic treatment planning and treatment. Ortho ...
Diagnostic Reliability of I-123 Ioflupane SPECT Imaging (DaTscan
... 1. Benamer H, Patterson J, Grosset D. Accurate differentiation of Parkinsonism and essential tremor using visual assessment of [125I]-FP-CIT SPECT imaging: the [123I]-FP-CIT Study Group. Mov Disord 2000; 15:503-10. 2. Chou KL, Hurtig HI, Stern MB, et al. Diagnostic accuracy of [99mTc]TRODAT-1 SPECT ...
... 1. Benamer H, Patterson J, Grosset D. Accurate differentiation of Parkinsonism and essential tremor using visual assessment of [125I]-FP-CIT SPECT imaging: the [123I]-FP-CIT Study Group. Mov Disord 2000; 15:503-10. 2. Chou KL, Hurtig HI, Stern MB, et al. Diagnostic accuracy of [99mTc]TRODAT-1 SPECT ...
Body Imaging
... sonography of the prostate may also be performed with an appropriate chaperone where necessary. Doppler techniques including those of the carotid, organ transplant and peripheral vasculature should also be covered. In addition, contrast-enhanced sonographic techniques should be learned. 2. CT scanni ...
... sonography of the prostate may also be performed with an appropriate chaperone where necessary. Doppler techniques including those of the carotid, organ transplant and peripheral vasculature should also be covered. In addition, contrast-enhanced sonographic techniques should be learned. 2. CT scanni ...
PET Phantom Instructions
... time in the appropriate boxes on the Phantom Dilution Worksheet. The F-18 solution may need to be diluted to facilitate measurement because the concentration is often as high as 75 mCi/cc. For future reference, enter times into the table below. 2) Fill the phantom with water. Be sure that the Teflon ...
... time in the appropriate boxes on the Phantom Dilution Worksheet. The F-18 solution may need to be diluted to facilitate measurement because the concentration is often as high as 75 mCi/cc. For future reference, enter times into the table below. 2) Fill the phantom with water. Be sure that the Teflon ...
Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.If the biologically active molecule chosen for PET is fluorodeoxyglucose (FDG), an analogue of glucose, the concentrations of tracer imaged will indicate tissue metabolic activity as it corresponds to the regional glucose uptake. Use of this tracer to explore the possibility of cancer metastasis (i.e., spreading to other sites) is the most common type of PET scan in standard medical care (90% of current scans). However, on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest. One of the disadvantages of PET scanners is their operating cost.