IAEA-PGEC-VIII.1P1GenPrinc - International Atomic Energy Agency
... images, enhancing visibility (DSA) CT techniques allow 3-d reconstruction Nuclear medicine and MRI images are complementary to X Ray images ...
... images, enhancing visibility (DSA) CT techniques allow 3-d reconstruction Nuclear medicine and MRI images are complementary to X Ray images ...
Three-dimensional Dose Verification Using Normoxic Polymer Gel
... Tomotherapy delivers radiation using a rotating intensity-modulated fan beam geometry, and the modulation varies with gantry angle. Because the resultant dose-distributions comprise modulated contributions from many angles, the system has the potential to deliver highly conformal treatments. It was ...
... Tomotherapy delivers radiation using a rotating intensity-modulated fan beam geometry, and the modulation varies with gantry angle. Because the resultant dose-distributions comprise modulated contributions from many angles, the system has the potential to deliver highly conformal treatments. It was ...
Informatics in Radiology: Sliding-Thin
... minimal partial-volume averaging effects and excellent depiction of low-contrast lesions. In the initial stage of data postprocessing, a secondary “raw” data set is reconstructed from a CT volume data set that consists of overlapping sections with a thickness of 1 mm or less, acquired at standard ra ...
... minimal partial-volume averaging effects and excellent depiction of low-contrast lesions. In the initial stage of data postprocessing, a secondary “raw” data set is reconstructed from a CT volume data set that consists of overlapping sections with a thickness of 1 mm or less, acquired at standard ra ...
Magnetic resonance imaging- based radiation therapy
... Conventional radiation therapy treatment planning (RTP) workflow at a clinic contains following steps: simulation imaging, target delineation, dose calculation and image guidance, in chronological order. Workflow begins with simulation imaging where patient is scanned at the treatment position. The ...
... Conventional radiation therapy treatment planning (RTP) workflow at a clinic contains following steps: simulation imaging, target delineation, dose calculation and image guidance, in chronological order. Workflow begins with simulation imaging where patient is scanned at the treatment position. The ...
64E-5
... 2. Personnel monitoring shall be provided for all individuals who operate photofluorographic apparatus. 3. The average exposure, including backscatter, for chests measuring 25 centimeters in thickness shall not exceed 100 millirems (1.0 mSv) at the point where the x-ray beam enters the patient. (b) ...
... 2. Personnel monitoring shall be provided for all individuals who operate photofluorographic apparatus. 3. The average exposure, including backscatter, for chests measuring 25 centimeters in thickness shall not exceed 100 millirems (1.0 mSv) at the point where the x-ray beam enters the patient. (b) ...
Book chapter (Published version)
... of tissues. In nuclear medicine, including SPECT and PET, this is done by administering the patient with a biologically active molecule or pharmaceutical, which is radiolabelled and accumulated in response to its biochemical attributes. Nuclear imaging relies on the tracer principle in which a minut ...
... of tissues. In nuclear medicine, including SPECT and PET, this is done by administering the patient with a biologically active molecule or pharmaceutical, which is radiolabelled and accumulated in response to its biochemical attributes. Nuclear imaging relies on the tracer principle in which a minut ...
How to Appropriately Calculate Effective Dose for CT
... for CT, two approaches are common: the first uses software-based Monte Carlo methods such as CT-Expo (Sascrad) or ImPACT (ImPACT Group), and the second was developed as a simplified method to quickly estimate effective dose using the dose-length product (DLP) and sets of age- and body region–specifi ...
... for CT, two approaches are common: the first uses software-based Monte Carlo methods such as CT-Expo (Sascrad) or ImPACT (ImPACT Group), and the second was developed as a simplified method to quickly estimate effective dose using the dose-length product (DLP) and sets of age- and body region–specifi ...
Study the Quality Assurance of Conventional X
... various filters needed to accurately measure kilo voltage. Each filter card is coded so that the NERO Max “ knows “ which filter is in use and its position. Reproducibility of dose, time and high voltage parameters for Siemen X-ray machine of one of Mansoura Hospitals measured with the NERO Max that ...
... various filters needed to accurately measure kilo voltage. Each filter card is coded so that the NERO Max “ knows “ which filter is in use and its position. Reproducibility of dose, time and high voltage parameters for Siemen X-ray machine of one of Mansoura Hospitals measured with the NERO Max that ...
New Efficient Detector for Radiation Therapy Imaging using Gas Electron Multipliers Ostling
... the dose might have to be reduced in order not to harm healthy tissues that are located inside the target volume. However, using intensity modulated radiation therapy, IMRT, for a given internal margin the tumor cure can successively be improved [8], not least by adaptive approaches [9]. For decades ...
... the dose might have to be reduced in order not to harm healthy tissues that are located inside the target volume. However, using intensity modulated radiation therapy, IMRT, for a given internal margin the tumor cure can successively be improved [8], not least by adaptive approaches [9]. For decades ...
Contributors - Dommelroute
... It has been nearly a decade since the first PET-CT scanners became commercially available. At the time of the initial launch of clinical PET-CT scanners it was thought at most 30% of the PET scanner market would be in the form of PET-CT scanners. Within only a few years (by 2006), however, PETCT sca ...
... It has been nearly a decade since the first PET-CT scanners became commercially available. At the time of the initial launch of clinical PET-CT scanners it was thought at most 30% of the PET scanner market would be in the form of PET-CT scanners. Within only a few years (by 2006), however, PETCT sca ...
Extracting respiratory signals from thoracic cone beam CT
... motion while the other to the gantry rotation. As the gantry rotates during the data acquisition, the projection data point winds around the torus along a helical trajectory, as shown in figure 2(a). If we were able to find a plane that is locally perpendicular to the direction of the torus that cor ...
... motion while the other to the gantry rotation. As the gantry rotates during the data acquisition, the projection data point winds around the torus along a helical trajectory, as shown in figure 2(a). If we were able to find a plane that is locally perpendicular to the direction of the torus that cor ...
IMRT verification by three-dimensional dose reconstruction
... the effects of MLC leaf position error on dose delivery. Verification of patient positioning. Where high dose gradients are used to spare organs at risk close to a target volume, special attention should be given to ensuring that the patient is correctly positioned. This may include organ motion bot ...
... the effects of MLC leaf position error on dose delivery. Verification of patient positioning. Where high dose gradients are used to spare organs at risk close to a target volume, special attention should be given to ensuring that the patient is correctly positioned. This may include organ motion bot ...
3D Dosimetry of the Amersham 6711 and AgX100 Iodine
... A. Thomas , J. Newton , M. Oldham. “A method to correct for stray light in telecentric optical‐CT imaging of radiochromic dosimeters”. (accessed Aug 2012) M. Oldham. “3D Dosimetry, and Clinically Meaningful QA” presentation. (accessed Aug 2012) R Popert, P Acher, N Nichol, S Morris, Ron Beaney. “B ...
... A. Thomas , J. Newton , M. Oldham. “A method to correct for stray light in telecentric optical‐CT imaging of radiochromic dosimeters”. (accessed Aug 2012) M. Oldham. “3D Dosimetry, and Clinically Meaningful QA” presentation. (accessed Aug 2012) R Popert, P Acher, N Nichol, S Morris, Ron Beaney. “B ...
Applications of Tomographic Imaging in Nuclear Medicine
... Medical imaging is one of the fundamental clinical methods for diagnosis of early stages of many diseases. The wide range of modalities enable examinations of different organs in a non-invasive way. The early detection ensures a better prognosis with more therapeutic options and results in greater r ...
... Medical imaging is one of the fundamental clinical methods for diagnosis of early stages of many diseases. The wide range of modalities enable examinations of different organs in a non-invasive way. The early detection ensures a better prognosis with more therapeutic options and results in greater r ...
the impact of positron emission tomography/computed tomography
... ( p ⫽ 0.0002). The investigators concluded the need for a unified contouring protocol for PET/CT treatment planning. We recently reported (12) on the use of PET/CT as a treatment planning tool for lung cancer. We advocated the use of the anatomic biologic volume to represent the contoured GTV when P ...
... ( p ⫽ 0.0002). The investigators concluded the need for a unified contouring protocol for PET/CT treatment planning. We recently reported (12) on the use of PET/CT as a treatment planning tool for lung cancer. We advocated the use of the anatomic biologic volume to represent the contoured GTV when P ...
A Case of Complicated Diverticulitis
... Free gas associated with localized or generalized ascites and possible peritoneal wall thickening ...
... Free gas associated with localized or generalized ascites and possible peritoneal wall thickening ...
Diagnostic Reference Levels (DRLs) in projection radiography
... Standard radiology procedures in projection radiography (plain film or digital equipment) account for 48% of the total number of examinations in diagnostic radiology and contribute 41% to the collective dose [1]. This implies that justification and optimization is not only important for high-dose ap ...
... Standard radiology procedures in projection radiography (plain film or digital equipment) account for 48% of the total number of examinations in diagnostic radiology and contribute 41% to the collective dose [1]. This implies that justification and optimization is not only important for high-dose ap ...
Evaluation of Common Breast Problems: A Primer for
... Fine needle aspiration (FNA) for cytologic analysis represents a useful extension of the clinical evaluation of a palpable mass. FNA can accomplish cyst aspiration, in which the intent is both diagnostic and therapeutic, by eliminating a fluid-filled cyst, or can be diagnostic for solid masses, by a ...
... Fine needle aspiration (FNA) for cytologic analysis represents a useful extension of the clinical evaluation of a palpable mass. FNA can accomplish cyst aspiration, in which the intent is both diagnostic and therapeutic, by eliminating a fluid-filled cyst, or can be diagnostic for solid masses, by a ...
image guided radiation therapy applications for
... to a 12% lower dose than that prescribed. It is shown that difficulties in imaging soft tissue in the neck region are circumvented with ultrasound imaging, and after dosimetric verification it is argued that adaptive replanning may be more beneficial than patient realignment when intensity modulated ...
... to a 12% lower dose than that prescribed. It is shown that difficulties in imaging soft tissue in the neck region are circumvented with ultrasound imaging, and after dosimetric verification it is argued that adaptive replanning may be more beneficial than patient realignment when intensity modulated ...
Multi-parametric prostate and whole
... SNR for prostate imaging. When performing prostate MRI without endorectal coils, air in the rectum may cause susceptibility effects, particularly at 3.0T. So, in order to reduce the susceptibility effect, we use a small field-ofview DWI for generating the ADC map. We also include a separate high b-v ...
... SNR for prostate imaging. When performing prostate MRI without endorectal coils, air in the rectum may cause susceptibility effects, particularly at 3.0T. So, in order to reduce the susceptibility effect, we use a small field-ofview DWI for generating the ADC map. We also include a separate high b-v ...
Neuroradiology - LSUHSC Shreveport
... (Introductory Statement Adopted with Modification from the American Society of Neuroradiology) It is expected that residents will progressively develop their abilities to perform and interpret imaging studies of the central nervous system. Residents will be taught the practical clinical skills neces ...
... (Introductory Statement Adopted with Modification from the American Society of Neuroradiology) It is expected that residents will progressively develop their abilities to perform and interpret imaging studies of the central nervous system. Residents will be taught the practical clinical skills neces ...
Rad Tech 4912 MRI Registry Review
... When imaging a patient with suspected pituitary microadenoma, contrast is injected and imaging is performed: a: With delayed imaging because lesions enhance slowly and pituitary gland does not enhance. b: With no specific timing considerations. c: Rapidly because lesions appear as low signal intensi ...
... When imaging a patient with suspected pituitary microadenoma, contrast is injected and imaging is performed: a: With delayed imaging because lesions enhance slowly and pituitary gland does not enhance. b: With no specific timing considerations. c: Rapidly because lesions appear as low signal intensi ...
Use of Diffusion Tensor Images in Glioma Growth Modeling for
... fig. 1c and in the λ1 images (fig. 1d to 1f). Illustration of the growth model without DTI Figure 1b illustrates the result of the tumor growth model. It shows the isolines of the tumor cell density throughout the brain for isotropic diffusion in WM (γ = 0). The orange contour in fig. 1a represents ...
... fig. 1c and in the λ1 images (fig. 1d to 1f). Illustration of the growth model without DTI Figure 1b illustrates the result of the tumor growth model. It shows the isolines of the tumor cell density throughout the brain for isotropic diffusion in WM (γ = 0). The orange contour in fig. 1a represents ...
Revival of a Gamma Camera
... At the beginning of the 1940s, the first dedicated cyclotron for medical use appeared, and as early as 1941, patients were being treated with radioiodine. The 1950s represent a remarkable growth. Several new pharmaceuticals were proposed and implemented and in the mid 1950s even organ-specific radio ...
... At the beginning of the 1940s, the first dedicated cyclotron for medical use appeared, and as early as 1941, patients were being treated with radioiodine. The 1950s represent a remarkable growth. Several new pharmaceuticals were proposed and implemented and in the mid 1950s even organ-specific radio ...
Innovation Focus Hybrid Imaging
... modalities SPECT (Single Photon Emission Computed Tomography) and PET (Positron emission tomography) can bring almost any information about the functioning of cells, deep and precise morphological descriptions can be obtained with conventional X-ray computed tomography (CT) or magnetic resonance ima ...
... modalities SPECT (Single Photon Emission Computed Tomography) and PET (Positron emission tomography) can bring almost any information about the functioning of cells, deep and precise morphological descriptions can be obtained with conventional X-ray computed tomography (CT) or magnetic resonance ima ...