Construction of mouse phantoms from segmented CT
... were scanned using an Epson Perfection V700 Photo flatbed scanner (Epson, Suwa, NGN, Japan) and processed using FilmQA Pro software (Ashland, Covington, KY). All three color channels were used for calibration and subsequent dose mapping to obtain optimum results which are corrected for nonuniformiti ...
... were scanned using an Epson Perfection V700 Photo flatbed scanner (Epson, Suwa, NGN, Japan) and processed using FilmQA Pro software (Ashland, Covington, KY). All three color channels were used for calibration and subsequent dose mapping to obtain optimum results which are corrected for nonuniformiti ...
Three-dimensional Dose Verification Using Normoxic Polymer Gel
... linear relationship with dose was present from 0 to 6.5 Gy. One group of gel samples were measured in near real-time, in which the gel phantom was read right after the irradiation. The other group was measured 12 hours after irradiation so the gel phantom can be exposed to oxygen. Several post-imagi ...
... linear relationship with dose was present from 0 to 6.5 Gy. One group of gel samples were measured in near real-time, in which the gel phantom was read right after the irradiation. The other group was measured 12 hours after irradiation so the gel phantom can be exposed to oxygen. Several post-imagi ...
Role of CTDI to estimate patient dose from a single slice to multi
... obtained in the factory by scanning two acrylic cylinders (one with a 16-cm diameter, and the other with a 32-cm diameter) on a representative sample of each CT scanner. In clinical use, when the CT settings for a patient examination are selected, the machine calculates the CTDIvol for these cylinde ...
... obtained in the factory by scanning two acrylic cylinders (one with a 16-cm diameter, and the other with a 32-cm diameter) on a representative sample of each CT scanner. In clinical use, when the CT settings for a patient examination are selected, the machine calculates the CTDIvol for these cylinde ...
Important Safety Information
... It is not known whether Sodium Fluoride F 18 Injection is excreted into human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to interrupt nursing after administration of Sodium Fluor ...
... It is not known whether Sodium Fluoride F 18 Injection is excreted into human milk. Because many drugs are excreted in human milk and because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to interrupt nursing after administration of Sodium Fluor ...
4.2 Emission Computed Tomography
... The fact that the annihilation of a positron leads to two gamma-ray photons traveling in opposite directions forms the basis of a unique way of detecting positrons. Coincident detection by two physically separated detectors of two gamma-ray photons locates a positron emitting nucleus on a line joini ...
... The fact that the annihilation of a positron leads to two gamma-ray photons traveling in opposite directions forms the basis of a unique way of detecting positrons. Coincident detection by two physically separated detectors of two gamma-ray photons locates a positron emitting nucleus on a line joini ...
Improving digital image quality for larger patient sizes without
... modern systems is a digital flat detector. Most flat detectors have a scintillator material on top of the detector plate which converts the X-rays into visible light. The visible light is detected by the detector plate, which is subdivided into a square pattern of pixels. These pixels each give an o ...
... modern systems is a digital flat detector. Most flat detectors have a scintillator material on top of the detector plate which converts the X-rays into visible light. The visible light is detected by the detector plate, which is subdivided into a square pattern of pixels. These pixels each give an o ...
Tomographic Imaging on a Cobalt Radiotherapy Machine Matthew Brendon Marsh
... requires a stable, high-voltage, high-current grid connection and an elaborate cooling system. Linacs have complex calibration and output checking procedures that must be performed on a regular basis; a cobalt machine’s quality assurance procedures are relatively simple. Cobalt, though, has not seen ...
... requires a stable, high-voltage, high-current grid connection and an elaborate cooling system. Linacs have complex calibration and output checking procedures that must be performed on a regular basis; a cobalt machine’s quality assurance procedures are relatively simple. Cobalt, though, has not seen ...
Evaluation of image quality and patient radiation dose in digital
... the latter detector achieved a dose reduction of more than 60%. In flatpanel systems based on amorphous selenium, on the other hand, similar dose levels as measured in state-of-the-art screen-film chest radiography must be applied. Similarly, no significant dose reductions were found for storage pho ...
... the latter detector achieved a dose reduction of more than 60%. In flatpanel systems based on amorphous selenium, on the other hand, similar dose levels as measured in state-of-the-art screen-film chest radiography must be applied. Similarly, no significant dose reductions were found for storage pho ...
Kit for the Preparation of Technetium Tc99m Sulfur Colloid Injection
... over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of ...
... over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of ...
RT Student Handbook - Columbus Technical College
... Technologist. In the beginning, the school was a one year program until July of 1960 when it became a two year program as required by accreditation from the Joint Review Committee on Education in X-Ray Technology. Under the direction of Dorothy R. Freeman, in January of 1967, The Medical Center Scho ...
... Technologist. In the beginning, the school was a one year program until July of 1960 when it became a two year program as required by accreditation from the Joint Review Committee on Education in X-Ray Technology. Under the direction of Dorothy R. Freeman, in January of 1967, The Medical Center Scho ...
Dose Reduction Strategies for SPECT/CT and PET/CT
... z-axis)(Philips), tube current CareDose (Siemens) modulation involves variation of the tube current both during gantry rotation and along the z-axis Angular Direction of the patient (ie, from the anteroposterior direction to the lateral direction, and from the shoulders to the abdomen). The operator ...
... z-axis)(Philips), tube current CareDose (Siemens) modulation involves variation of the tube current both during gantry rotation and along the z-axis Angular Direction of the patient (ie, from the anteroposterior direction to the lateral direction, and from the shoulders to the abdomen). The operator ...
The Effects of Organ-based Tube Current Modulation on Radiation
... The purpose of this thesis was to quantify dose and noise performance of organ-dosebased tube current modulation (ODM) through experimental studies with an anthropomorphic phantom and simulations with a voxelized phantom library. Tube current modulation is a dose reduction technique that modulates r ...
... The purpose of this thesis was to quantify dose and noise performance of organ-dosebased tube current modulation (ODM) through experimental studies with an anthropomorphic phantom and simulations with a voxelized phantom library. Tube current modulation is a dose reduction technique that modulates r ...
1 Comparison of Effective Dose and Lifetime Risk of Cancer
... over both genders and all ages and so assessment and comparison of risk for an individual patient or patient group is not advised [5-8].Lifetime risk of cancer incidence, sometimes referred to as lifetime biological risk is a concept that has been suggested by a number of authors as an alternative t ...
... over both genders and all ages and so assessment and comparison of risk for an individual patient or patient group is not advised [5-8].Lifetime risk of cancer incidence, sometimes referred to as lifetime biological risk is a concept that has been suggested by a number of authors as an alternative t ...
Quantitative Measurements of X
... process and never drop below 2 or 3 eV. Refer to graphs of the relative yield as a function of atomic number (Podgorsak, 2010). There are several other internal conversion processes that compete with fluorescence but their rates are much lower and they will not be discussed here. The Auger effect is ...
... process and never drop below 2 or 3 eV. Refer to graphs of the relative yield as a function of atomic number (Podgorsak, 2010). There are several other internal conversion processes that compete with fluorescence but their rates are much lower and they will not be discussed here. The Auger effect is ...
Quality control guidance for nuclear medicine equipment
... equipment, the object being imaged, the professional skills of the person performing an examination and the subjectivity of the person interpreting the image (Figure 2). Optimization requires in addition to technical quality control, an assessment of both the patient radiation exposure and diagnost ...
... equipment, the object being imaged, the professional skills of the person performing an examination and the subjectivity of the person interpreting the image (Figure 2). Optimization requires in addition to technical quality control, an assessment of both the patient radiation exposure and diagnost ...
Radiation Oncology Error Management
... dose delivered to the patient be within ±5% of the prescribed dose. The goal of a QA program for linear accelerators is to assure that the machine characteristics do not deviate significantly from their baseline values acquired at the time of acceptance and commissioning. ...
... dose delivered to the patient be within ±5% of the prescribed dose. The goal of a QA program for linear accelerators is to assure that the machine characteristics do not deviate significantly from their baseline values acquired at the time of acceptance and commissioning. ...
Policies Standards And Guidelines For Radiologic Technology
... Section 5. Bachelor of Science in Radiologic Technology graduates, like any other Health Professions Education, must be able to apply the cognitive, psychomotor, and affective aspects of the profession in the performance of radiological procedures. Graduates shall: 5.1. provide health care services ...
... Section 5. Bachelor of Science in Radiologic Technology graduates, like any other Health Professions Education, must be able to apply the cognitive, psychomotor, and affective aspects of the profession in the performance of radiological procedures. Graduates shall: 5.1. provide health care services ...
Trends in radiation protection of positron emission tomography
... Hence, administered activity for a PET scan cannot be reduced substantially because it is related to the patient’s weight. The easiest way to decrease the patient radiation dose burden from PET/CT imaging is to optimise and adjust the CT scan acquisition parameters for each patient. There is a need ...
... Hence, administered activity for a PET scan cannot be reduced substantially because it is related to the patient’s weight. The easiest way to decrease the patient radiation dose burden from PET/CT imaging is to optimise and adjust the CT scan acquisition parameters for each patient. There is a need ...
PPCO Twist System - Today`s Veterinary Practice journal of
... bency with the pelvic limbs pulled caudally, placwith the horizontal line of the collimator light cross ing the affected stifle in the center of the cassette/ hair positioned midline with the femur/tibia. Collimate detector (Figure 3A). The patient can be placed in a to include the ...
... bency with the pelvic limbs pulled caudally, placwith the horizontal line of the collimator light cross ing the affected stifle in the center of the cassette/ hair positioned midline with the femur/tibia. Collimate detector (Figure 3A). The patient can be placed in a to include the ...
Small Animal radiography Stifle Joint and CruS
... bency with the pelvic limbs pulled caudally, placwith the horizontal line of the collimator light cross ing the affected stifle in the center of the cassette/ hair positioned midline with the femur/tibia. Collimate detector (Figure 3A). The patient can be placed in a to include the ...
... bency with the pelvic limbs pulled caudally, placwith the horizontal line of the collimator light cross ing the affected stifle in the center of the cassette/ hair positioned midline with the femur/tibia. Collimate detector (Figure 3A). The patient can be placed in a to include the ...
Clinical Dose Optimization Service™
... Management and Review Practice Guideline. As a result, these Joint Commission standards requirements likely do not fall under your current physics contract. Further, this is a relatively new field for medical physicists and most physicists do not have specific training in this area. Landauer Medical ...
... Management and Review Practice Guideline. As a result, these Joint Commission standards requirements likely do not fall under your current physics contract. Further, this is a relatively new field for medical physicists and most physicists do not have specific training in this area. Landauer Medical ...
detector exposure indicator in ge x-ray systems
... Recent studies and investigations performed by different research groups [4-8,] have strengthened the case that DEI can be a useful tool for QA/QC in X-ray digital images. ...
... Recent studies and investigations performed by different research groups [4-8,] have strengthened the case that DEI can be a useful tool for QA/QC in X-ray digital images. ...
Package Insert - Zevacor Molecular
... After intravenous administration, fluoride F 18 ion is rapidly cleared from the plasma in a biexponential manner. The first phase has a half-life of 0.4 h, and the second phase has a half-life of 2.6 h. Essentially all the fluoride F 18 that is delivered to bone by the blood is retained in the bone. ...
... After intravenous administration, fluoride F 18 ion is rapidly cleared from the plasma in a biexponential manner. The first phase has a half-life of 0.4 h, and the second phase has a half-life of 2.6 h. Essentially all the fluoride F 18 that is delivered to bone by the blood is retained in the bone. ...
Image-guided radiation therapy (IGRT): practical
... systems, the detector unit receives the beam directly from the accelerator source to acquire a series of 2D projections that are then 3D reconstructed. In terms of image quality, KV CBCT allows to obtain a higher contrast resolution with respect to the MV [13, 14]. Tomotherapy image systems Helical ...
... systems, the detector unit receives the beam directly from the accelerator source to acquire a series of 2D projections that are then 3D reconstructed. In terms of image quality, KV CBCT allows to obtain a higher contrast resolution with respect to the MV [13, 14]. Tomotherapy image systems Helical ...
Chapter 7 Diagnostic Imaging of Horses
... Understanding that the distal limb of one leg is indistinguishable radiographically from the distal limb of any other leg is essential. This is because of the similar bone structure of all limbs distal to the carpus/tarsus. Without proper identification the clinician cannot tell a right distal limb ...
... Understanding that the distal limb of one leg is indistinguishable radiographically from the distal limb of any other leg is essential. This is because of the similar bone structure of all limbs distal to the carpus/tarsus. Without proper identification the clinician cannot tell a right distal limb ...