Clinical Aspects of General Nuclear Medicine
... Reducing the administered activity of a radiopharmaceutical will reduce patient radiation exposure, but it will also affect the examination’s imaging characteristics and may lower image quality. In the simplest terms, reducing administered activity will lower the count rate. If the examination’s oth ...
... Reducing the administered activity of a radiopharmaceutical will reduce patient radiation exposure, but it will also affect the examination’s imaging characteristics and may lower image quality. In the simplest terms, reducing administered activity will lower the count rate. If the examination’s oth ...
Prediction of respiratory tumour motion for real-time image
... has demonstrated how to locate and track the position of a tumour in real-time using diagnostic x-ray imaging to find implanted radio-opaque markers. However, the delivery of a treatment plan through gating or beam tracking requires adequate consideration of treatment system latencies, including ima ...
... has demonstrated how to locate and track the position of a tumour in real-time using diagnostic x-ray imaging to find implanted radio-opaque markers. However, the delivery of a treatment plan through gating or beam tracking requires adequate consideration of treatment system latencies, including ima ...
in head and neck cancer
... Lower border of the lateral fields is placed just superior to the arytenoids (below hyoid bone). In patient who can hyperextend his neck an asymmetric jaw (half beam block), can be used. If the patient can not hyperextend the neck, use a slanting inferior border (by collimation), to avoid matching a ...
... Lower border of the lateral fields is placed just superior to the arytenoids (below hyoid bone). In patient who can hyperextend his neck an asymmetric jaw (half beam block), can be used. If the patient can not hyperextend the neck, use a slanting inferior border (by collimation), to avoid matching a ...
Computed Tomography
... The development of computed tomography (CT) in the early 1970s revolutionized medical radiology. For the first time, physicians were able to obtain high-quality tomographic (cross-sectional) images of internal structures of the body. Over the next 10 years, 18 manufacturers competed for the explodin ...
... The development of computed tomography (CT) in the early 1970s revolutionized medical radiology. For the first time, physicians were able to obtain high-quality tomographic (cross-sectional) images of internal structures of the body. Over the next 10 years, 18 manufacturers competed for the explodin ...
Octreotide (Somatostatin
... below and adjacent to the window for the 247 keV peak and 15% window below and adjacent to the window for the 172 keV peak and an 8% window above and adjacent to the 172 keV peak window. Patient Positioning: Verify that the patient has no metallic objects in the area to be scanned. Patients should b ...
... below and adjacent to the window for the 247 keV peak and 15% window below and adjacent to the window for the 172 keV peak and an 8% window above and adjacent to the 172 keV peak window. Patient Positioning: Verify that the patient has no metallic objects in the area to be scanned. Patients should b ...
IOSR Journal of Pharmacy and Biological Sciences (IOSR-JPBS) e-ISSN: 2278-3008, p-ISSN:2319-7676.
... working in hazardous environments such as imaging rooms where radiation is used. During fluoroscopic or CT guided procedures the operator frequently advances the cannula with the imaging beam off and then acquires additional images to identify the current position of the tip. Options to overcome the ...
... working in hazardous environments such as imaging rooms where radiation is used. During fluoroscopic or CT guided procedures the operator frequently advances the cannula with the imaging beam off and then acquires additional images to identify the current position of the tip. Options to overcome the ...
Ultra-Fast Digital Tomosynthesis Reconstruction Using General
... tomosynthesis (DTS) imaging based on the algorithm proposed by Feldkamp, Davis, and Kress (FDK) using standard general-purpose graphics processing unit (GPGPU) programming interface. To this end, the FDK-based DTS algorithm was programmed “in-house” with C language with utilization of 1) GPU and 2) ...
... tomosynthesis (DTS) imaging based on the algorithm proposed by Feldkamp, Davis, and Kress (FDK) using standard general-purpose graphics processing unit (GPGPU) programming interface. To this end, the FDK-based DTS algorithm was programmed “in-house” with C language with utilization of 1) GPU and 2) ...
Nuclear Medicine Preparation Instructions
... required to stay for delayed pictures up to 3 hours) Patient must eat an egg sandwich with some radioactive tracer at beginning of test. Please advise department if any allergy to egg ...
... required to stay for delayed pictures up to 3 hours) Patient must eat an egg sandwich with some radioactive tracer at beginning of test. Please advise department if any allergy to egg ...
Utility of the optical flow method for motion tracking in...
... for translation, rotation and then, using the global transformation as an initialization, estimates the local flow velocity vector for each point between the two images. The motion parameters (i.e. velocity) are computed which minimize the sum of the square differences (SSD) over three pyramid level ...
... for translation, rotation and then, using the global transformation as an initialization, estimates the local flow velocity vector for each point between the two images. The motion parameters (i.e. velocity) are computed which minimize the sum of the square differences (SSD) over three pyramid level ...
Winners and Losers
... PET/CT Imaging revealed two undiagnosed lymph nodes Staging and treatment volume were both altered. Studies found that up to 62% of treatments were adjusted as a result of a PET Scan ...
... PET/CT Imaging revealed two undiagnosed lymph nodes Staging and treatment volume were both altered. Studies found that up to 62% of treatments were adjusted as a result of a PET Scan ...
Clinical use of electronic portal imaging: Report of AAPM Radiation
... where ⌬ is the difference in attenuation between the object and the background 共i.e., ⌬⫽L x 兩 bone⫺ water兩 ), bone and water are the x-ray attenuation coefficients for bone and water, respectively, L x is the thickness of the anatomic structure, and SF is the scatter fraction 兵 SF⫽ s ( s ...
... where ⌬ is the difference in attenuation between the object and the background 共i.e., ⌬⫽L x 兩 bone⫺ water兩 ), bone and water are the x-ray attenuation coefficients for bone and water, respectively, L x is the thickness of the anatomic structure, and SF is the scatter fraction 兵 SF⫽ s ( s ...
Evaluation of Linear Accelerator Gating with Real
... JAY PETERSEN, B.S.,z BRIAN SARGENT, B.S.,z AND PARAG PARIKH, M.D.* * Washington University School of Medicine, St. Louis, MO; y Swedish Cancer Institute, Seattle, WA; and z Calypso Medical Technologies, Seattle, WA Purpose: Intrafraction organ motion can produce dosimetric errors in radiotherapy. Co ...
... JAY PETERSEN, B.S.,z BRIAN SARGENT, B.S.,z AND PARAG PARIKH, M.D.* * Washington University School of Medicine, St. Louis, MO; y Swedish Cancer Institute, Seattle, WA; and z Calypso Medical Technologies, Seattle, WA Purpose: Intrafraction organ motion can produce dosimetric errors in radiotherapy. Co ...
Educational Objectives TG113: Improving Treatment Consistency and Data Quality for Clinical Trials
... improve our knowledge of differences) Design of trials: Allow for variable margins based on immobilization and localization methods Continue to require credentialing as new ...
... improve our knowledge of differences) Design of trials: Allow for variable margins based on immobilization and localization methods Continue to require credentialing as new ...
annual report of the erwin l. hahn institute for magnetic resonance
... at 7T are often seen as a disadvantage, but in this project the resulting strong T2* contrast is utilized both to obtain images of the vasculature and to delineate fine structures in the cortex that are difficult to detect at lower field strengths. HE ...
... at 7T are often seen as a disadvantage, but in this project the resulting strong T2* contrast is utilized both to obtain images of the vasculature and to delineate fine structures in the cortex that are difficult to detect at lower field strengths. HE ...
Quality Control in Conventional Radiology
... in a dose reduction of 26-36% [19]. The minimum and maximum deviations in tube voltage accuracy are presented in table 2. The minimum deviation was 0.1% in F Hospital and the maximum deviation was reported in B Hospital (27.52%); in addition, the rate of deviation was 20.34% in C Hospital. The great ...
... in a dose reduction of 26-36% [19]. The minimum and maximum deviations in tube voltage accuracy are presented in table 2. The minimum deviation was 0.1% in F Hospital and the maximum deviation was reported in B Hospital (27.52%); in addition, the rate of deviation was 20.34% in C Hospital. The great ...
Digital mammography
... Digital mammography offers additional benefits, such as a reduction in the number of women required to undergo additional tests to provide physicians with supplementary images. With the digital mammography system, image quality is checked immediately after exposure, as opposed to traditional film pr ...
... Digital mammography offers additional benefits, such as a reduction in the number of women required to undergo additional tests to provide physicians with supplementary images. With the digital mammography system, image quality is checked immediately after exposure, as opposed to traditional film pr ...
Cone beam imaging: is this the ultimate imaging modality?
... helical progression to acquire multiple image slices. In contrast, cone beam (CB) units use a divergent cone/pyramidal-shaped beam, obtaining multiple planar projections in a single rotation. These cone-shaped beams are similar to those of X-ray units for two-dimensional (2D) radiography. MCT data a ...
... helical progression to acquire multiple image slices. In contrast, cone beam (CB) units use a divergent cone/pyramidal-shaped beam, obtaining multiple planar projections in a single rotation. These cone-shaped beams are similar to those of X-ray units for two-dimensional (2D) radiography. MCT data a ...
Guidance for Compliance Testing for Phototimer (AEC) Systems The
... Testing is done a non-uniform manner throughout the regulated community. This document Addresses the routine QC testing that is to be done in the regulated community for Phototimer systems and presented to Inspectors during mandated facility inspections. The facility’s report should include all info ...
... Testing is done a non-uniform manner throughout the regulated community. This document Addresses the routine QC testing that is to be done in the regulated community for Phototimer systems and presented to Inspectors during mandated facility inspections. The facility’s report should include all info ...
CEP10071 - Evaluation report: X-ray tomographic image guided
... and the possibility of escalating the dose to the target without compromising surrounding healthy tissue. In many cases IMRT plans are produced using inverse planning techniques. This involves assigning dose constraints to each defined target volume or organ at risk with the system automatically cal ...
... and the possibility of escalating the dose to the target without compromising surrounding healthy tissue. In many cases IMRT plans are produced using inverse planning techniques. This involves assigning dose constraints to each defined target volume or organ at risk with the system automatically cal ...
cosmic and solar radiation: facts for flight attendants
... How can I control my exposure? What makes exposure to cosmic and solar radiation tricky to control is that it can not be shielded; that is, cosmic and solar radiation are not blocked by the fuselage. If pregnant, some flight attendants choose to use up their accumulated sick leave. Currently, the on ...
... How can I control my exposure? What makes exposure to cosmic and solar radiation tricky to control is that it can not be shielded; that is, cosmic and solar radiation are not blocked by the fuselage. If pregnant, some flight attendants choose to use up their accumulated sick leave. Currently, the on ...
Practice Guideline for the Performance of Functional
... The fMRI images should be postprocessed using programs readily available. Initially a 3D automated image registration routine (6-parameter rigid body, sinc interpolation; second order adjustment for movement) or other valid algorithms should be applied to the EPI volumes to realign them with the fir ...
... The fMRI images should be postprocessed using programs readily available. Initially a 3D automated image registration routine (6-parameter rigid body, sinc interpolation; second order adjustment for movement) or other valid algorithms should be applied to the EPI volumes to realign them with the fir ...
Accrual Demonstration Project Presentation - S. Palmer
... OPTN/UNOS HCC-exception point update requirements for their region. This imaging to evaluate disease is considered standard of care. This research trial requires that complement imaging (CT or MRI, whichever imaging was not done as the standard of care) be completed at each 90-day interval. This ima ...
... OPTN/UNOS HCC-exception point update requirements for their region. This imaging to evaluate disease is considered standard of care. This research trial requires that complement imaging (CT or MRI, whichever imaging was not done as the standard of care) be completed at each 90-day interval. This ima ...
technical Aspects of a Videofluoroscopic Swallowing Study Aspects
... Canada. Off-label uses include varying dosage and using different routes of administration than those indicated on the product label. The manufacturer and supplier are not allowed to advertise the product for off-label use. In addition, federal authorities such as Health Canada do not regulate off-l ...
... Canada. Off-label uses include varying dosage and using different routes of administration than those indicated on the product label. The manufacturer and supplier are not allowed to advertise the product for off-label use. In addition, federal authorities such as Health Canada do not regulate off-l ...
Dose Management Update for Advocate Healthcare
... Pre-scan verification of patient information and protocol Standard PC.01.02.15 A 10 Prior to conducting a diagnostic imaging study, verify the following: • Correct patient • Correct imaging site • Correct patient positioning • For CT only: Correct imaging protocol • For CT only: Correct scanne ...
... Pre-scan verification of patient information and protocol Standard PC.01.02.15 A 10 Prior to conducting a diagnostic imaging study, verify the following: • Correct patient • Correct imaging site • Correct patient positioning • For CT only: Correct imaging protocol • For CT only: Correct scanne ...
Case Study: Recognition for Radiology
... Since the DICOE program measures imaging efficiency and the safety and quality of care, its attainment can potentially help radiology practices realize important financial benefits and demonstrate radiology’s excellence to policymakers. “I expect that our business will increase as a result of being ...
... Since the DICOE program measures imaging efficiency and the safety and quality of care, its attainment can potentially help radiology practices realize important financial benefits and demonstrate radiology’s excellence to policymakers. “I expect that our business will increase as a result of being ...