Brachytherapy Treatment Plan QA Review
... Review of Patient Images • Wrong patient and/or study datasets – When several patients are to be planned in the same day, such as in the case of prostate or brachytherapy partial breast irradiation. – Multiple imaging studies may be available, for example, multiple sets of prostate ultrasound image ...
... Review of Patient Images • Wrong patient and/or study datasets – When several patients are to be planned in the same day, such as in the case of prostate or brachytherapy partial breast irradiation. – Multiple imaging studies may be available, for example, multiple sets of prostate ultrasound image ...
Imaging doses from the Elekta Synergy X
... has a kilo-voltage X-ray source and opposing amorphous silicon flat panel imager, both mounted at 90˚ to the treatment head for the acquisition of kV X-ray projection images for radiography and fluoroscopy, figure 1. The different interaction mechanisms of kilo-voltage (kV) photons with tissues and ...
... has a kilo-voltage X-ray source and opposing amorphous silicon flat panel imager, both mounted at 90˚ to the treatment head for the acquisition of kV X-ray projection images for radiography and fluoroscopy, figure 1. The different interaction mechanisms of kilo-voltage (kV) photons with tissues and ...
R30 - American College of Radiology
... acquisition of data (60 seconds per frame) is preferred since it may be useful for resolving to clarify potentially ambiguous findings. Right anterior oblique, right lateral, and posterior planar views as well as SPECT and SPECT/CT images can be used for aid in problem-solving. in cases where it is ...
... acquisition of data (60 seconds per frame) is preferred since it may be useful for resolving to clarify potentially ambiguous findings. Right anterior oblique, right lateral, and posterior planar views as well as SPECT and SPECT/CT images can be used for aid in problem-solving. in cases where it is ...
Book chapter (Published version)
... information when 3D objects are projected onto 2D detector geometries. Tomographic imaging presents the advantage of circumventing this limitation through 3D image reconstruction of the region examined to provide series of 2D image slices of the body. For this reason, it was predicted that tomograph ...
... information when 3D objects are projected onto 2D detector geometries. Tomographic imaging presents the advantage of circumventing this limitation through 3D image reconstruction of the region examined to provide series of 2D image slices of the body. For this reason, it was predicted that tomograph ...
Image Quality and Dose Comparison between
... • Some patients scanned on the MiniCAT system may require a subsequent spiral CT for surgical navigation • Why not just do ONE SCAN using appropriately adjusted techniques: 1. reduce cumulative radiation dose 2. more efficient use of time and money ...
... • Some patients scanned on the MiniCAT system may require a subsequent spiral CT for surgical navigation • Why not just do ONE SCAN using appropriately adjusted techniques: 1. reduce cumulative radiation dose 2. more efficient use of time and money ...
CT Dosimetry: Com- parison of Measure- ment
... the methods for quantifying radiation dose is important for users of this technology. As compared to screen-film radiography, CT delivers considerably more dose to the patient (Table 1). When a screen-film radiograph is exposed to too much radiation, the film is overexposed and gives a visual indica ...
... the methods for quantifying radiation dose is important for users of this technology. As compared to screen-film radiography, CT delivers considerably more dose to the patient (Table 1). When a screen-film radiograph is exposed to too much radiation, the film is overexposed and gives a visual indica ...
Inclusion of the dose from kilovoltage cone beam CT in the radiation
... values in the table are obtained by multiplying the PINNACLE “computed dose” values by the ratio of bone/water mass energy absorption coefficients obtained from Table X of AAPM Task Group 61 report,17 assuming a 5.4 mm HVL for the 125 kVp beam measured before.10 As seen in the table, this results in ...
... values in the table are obtained by multiplying the PINNACLE “computed dose” values by the ratio of bone/water mass energy absorption coefficients obtained from Table X of AAPM Task Group 61 report,17 assuming a 5.4 mm HVL for the 125 kVp beam measured before.10 As seen in the table, this results in ...
Hologic HTC Grids Article
... Scattered radiation reduces contrast in all radiographic images. High contrast is especially important in mammography where cancerous tissue and normal tissue appear quite similar since the densities of the tissues are almost the same. Reducing the effects of scattered radiation has been achieved th ...
... Scattered radiation reduces contrast in all radiographic images. High contrast is especially important in mammography where cancerous tissue and normal tissue appear quite similar since the densities of the tissues are almost the same. Reducing the effects of scattered radiation has been achieved th ...
Eisenberg: Comprehensive Radiographic Pathology, 5th Edition
... In nuclear medicine, the patient ingests, or is injected with, a radiopharmaceutical that emits radiation, and an image is created from the signals radiating from the patient. REF: p. 27 32. The patient is injected or ingests the ionizing radiation through: a. A radiopharmaceutical b. An iodinated c ...
... In nuclear medicine, the patient ingests, or is injected with, a radiopharmaceutical that emits radiation, and an image is created from the signals radiating from the patient. REF: p. 27 32. The patient is injected or ingests the ionizing radiation through: a. A radiopharmaceutical b. An iodinated c ...
ACR–AAPM Technical Standard for Medical Physics Performance
... Imaging has been used to verify the patient position since the earliest days of external beam radiation therapy (EBRT). The first methods of imaging internal anatomy to verify the patient’s position on the treatment couch used the treatment beam to expose radiographic film. These images are called p ...
... Imaging has been used to verify the patient position since the earliest days of external beam radiation therapy (EBRT). The first methods of imaging internal anatomy to verify the patient’s position on the treatment couch used the treatment beam to expose radiographic film. These images are called p ...
CT Simulator QA
... accurately spaced from imaging plane & should be parallel and orthogonal with scan plane & intersect at a point co-incident ...
... accurately spaced from imaging plane & should be parallel and orthogonal with scan plane & intersect at a point co-incident ...
DRX Plus Detectors: Going from Good to Great
... executes an adaptive triggering that ensures a responsiveness that is exceptional for portable detectors. The DRX Plus implementation conducts continuous signal integration so that there is no lost exposure, while some competitive offerings require several milliseconds of signal detection time with ...
... executes an adaptive triggering that ensures a responsiveness that is exceptional for portable detectors. The DRX Plus implementation conducts continuous signal integration so that there is no lost exposure, while some competitive offerings require several milliseconds of signal detection time with ...
Radiation risk from mammography - Hendrick
... Like previous ICRP reports, the updated 2007 ICRP report quantifies radiation risk by using the concept of effective dose (13–15). Effective dose is the ionizing radiation exposure to the entire body that would result in equivalent detriment as exposure over a more limited region of the body. In the ...
... Like previous ICRP reports, the updated 2007 ICRP report quantifies radiation risk by using the concept of effective dose (13–15). Effective dose is the ionizing radiation exposure to the entire body that would result in equivalent detriment as exposure over a more limited region of the body. In the ...
General X-ray QA and QC Guideline Master_FINAL
... Alignment: X-ray to light field (CR and wireless DR detectors) / X-ray to detector (integrated DR detectors) Frequency: Quarterly To ensure accurate collimation and full coverage of image receptor without unnecessary exposure of patient. This test should be performed on all x-ray units. 5.2.1 Proced ...
... Alignment: X-ray to light field (CR and wireless DR detectors) / X-ray to detector (integrated DR detectors) Frequency: Quarterly To ensure accurate collimation and full coverage of image receptor without unnecessary exposure of patient. This test should be performed on all x-ray units. 5.2.1 Proced ...
Přednášky z lékařské biofyziky Masarykova univerzita v
... of photons per unit area per second) of the X-ray beam increases however the energy of individual photons does not. - The energy of the individual photons can be increased by increasing the voltage between the anode and cathode. Control panel – today most parameters of the device (including voltag ...
... of photons per unit area per second) of the X-ray beam increases however the energy of individual photons does not. - The energy of the individual photons can be increased by increasing the voltage between the anode and cathode. Control panel – today most parameters of the device (including voltag ...
CT Dose Summit 2011
... • Is there an opportunity for applicants to submit images at their ‘normal’ protocols at which they interpret even if noisier images than ACR criteria? • The ‘standard’ pediatric noise level is higher than adults but a moving target ...
... • Is there an opportunity for applicants to submit images at their ‘normal’ protocols at which they interpret even if noisier images than ACR criteria? • The ‘standard’ pediatric noise level is higher than adults but a moving target ...
Modul 1_Radiologycal diagnostic and therapy
... Name a method of radial therapy at which use the radiation source can rotate around the patient A. Therapy by a break radiation of high energies B. Selective accumulation of an isotope C. Intracavitary beta-ray therapy D. Short-distance gamma therapy E. * Long-distance gamma therapy Specify philosop ...
... Name a method of radial therapy at which use the radiation source can rotate around the patient A. Therapy by a break radiation of high energies B. Selective accumulation of an isotope C. Intracavitary beta-ray therapy D. Short-distance gamma therapy E. * Long-distance gamma therapy Specify philosop ...
Successful Panoramic Radiography
... Generally, intraoral digital radiography is touted as requiring 70 percent to 90 percent less radiation than that for traditional film radiography. Making such claims is not necessarily valid. The key to understanding these reductions is knowing what is being compared. The 70 percent to 90 percent r ...
... Generally, intraoral digital radiography is touted as requiring 70 percent to 90 percent less radiation than that for traditional film radiography. Making such claims is not necessarily valid. The key to understanding these reductions is knowing what is being compared. The 70 percent to 90 percent r ...
Pediatric CT: More than Just “Right-sizing” the Dose
... – Informal Poll of Image Gently Steering Committee ...
... – Informal Poll of Image Gently Steering Committee ...
Effect of Backscattered Radiation on X
... Image contrast depends on some parameters including potential voltage of the X-ray tube and presence of scattered radiation. The choice of peak tube voltage (kVp) plays an important role in the radiographic image contrast as well as in the radiograph density. Primary photons energy should not be too ...
... Image contrast depends on some parameters including potential voltage of the X-ray tube and presence of scattered radiation. The choice of peak tube voltage (kVp) plays an important role in the radiographic image contrast as well as in the radiograph density. Primary photons energy should not be too ...
9 Three-Dimensional Treatment Planning and Conformal Therapy
... (Purdy 1996a). Modern anatomic imaging technologies, such as X-ray computed tomography (CT) and magnetic resonance imaging (MRI), provide a fully 3D model of the cancer patient’s anatomy, which is often complemented with functional imaging, such as positron emission tomography (PET) or magnetic reso ...
... (Purdy 1996a). Modern anatomic imaging technologies, such as X-ray computed tomography (CT) and magnetic resonance imaging (MRI), provide a fully 3D model of the cancer patient’s anatomy, which is often complemented with functional imaging, such as positron emission tomography (PET) or magnetic reso ...
equipment requirements and quality control for
... results in enhanced response at high spatial frequency. On the other hand, the modulation transfer function of xeroradiography systems at low spatial frequency (broad-area contrast) is inferior to that of film. ...
... results in enhanced response at high spatial frequency. On the other hand, the modulation transfer function of xeroradiography systems at low spatial frequency (broad-area contrast) is inferior to that of film. ...
Radiation Protection 109
... After the DRLs have been established, the patient dose either in standard phantoms or groups of standard-sized patients should be assessed on equipment in every room of every radiological facility periodically, with the long-term aim of annual assessments, and after every major change or servic ...
... After the DRLs have been established, the patient dose either in standard phantoms or groups of standard-sized patients should be assessed on equipment in every room of every radiological facility periodically, with the long-term aim of annual assessments, and after every major change or servic ...
MSc Seferis
... in the mid-1980s, but the promise of digital imaging was not realized until the early 1990s, in conjunction with the establishment of first generation picture archiving and communications systems (PACS). At the time, film screen detectors have nearly replaced by computed radiography systems (CR), ch ...
... in the mid-1980s, but the promise of digital imaging was not realized until the early 1990s, in conjunction with the establishment of first generation picture archiving and communications systems (PACS). At the time, film screen detectors have nearly replaced by computed radiography systems (CR), ch ...
Copyright Information of the Article Published Online TITLE
... due to the high morbidity and reduced life expectancy related to CF[23,24]. The radiation dose incurred by patients with CF through medical imaging has recently been studied in Ireland, which has the highest worldwide incidence of CF[1]. During the 15-year study period, there was a 5.9 fold increase ...
... due to the high morbidity and reduced life expectancy related to CF[23,24]. The radiation dose incurred by patients with CF through medical imaging has recently been studied in Ireland, which has the highest worldwide incidence of CF[1]. During the 15-year study period, there was a 5.9 fold increase ...