Nigerian Radiation Safety in Diagnostic and Interventional
... "personal dose equivalent ", Hp(d) means the dose equivalent in soft tissue below a specified point on the body at the appropriate depth. (The relevant depths for the purposes of the Nigeria Basic Ionizing Radiation Regulations are generally d = 10 mm for strongly penetrating radiation and d = 0.07 ...
... "personal dose equivalent ", Hp(d) means the dose equivalent in soft tissue below a specified point on the body at the appropriate depth. (The relevant depths for the purposes of the Nigeria Basic Ionizing Radiation Regulations are generally d = 10 mm for strongly penetrating radiation and d = 0.07 ...
MRI of Benign Female Pelvis
... Field strengths of 1.5 T and, increasingly, 3 T are being used for evaluating the female pelvis. The current standard of care utilizes the pelvic multicoil array, which offers good signal-to-noise ratio and anatomic resolution. Voiding before scanning is usually suggested to minimize motion due to b ...
... Field strengths of 1.5 T and, increasingly, 3 T are being used for evaluating the female pelvis. The current standard of care utilizes the pelvic multicoil array, which offers good signal-to-noise ratio and anatomic resolution. Voiding before scanning is usually suggested to minimize motion due to b ...
ACR–ASNR–SCBT-MR Practice Parameter for the Performance of
... In the vertebral column, the most benign changes are well seen by MRI and initially consist of marrow edema, followed by fatty replacement of the marrow. These changes can occur as soon as a few weeks after the cessation of radiation therapy. More serious complications include radiation osteonecros ...
... In the vertebral column, the most benign changes are well seen by MRI and initially consist of marrow edema, followed by fatty replacement of the marrow. These changes can occur as soon as a few weeks after the cessation of radiation therapy. More serious complications include radiation osteonecros ...
ACR–ASNR–SCBT-MR Practice Parameter for the Performance of
... In the vertebral column, the most benign changes are well seen by MRI and initially consist of marrow edema, followed by fatty replacement of the marrow. These changes can occur as soon as a few weeks after the cessation of radiation therapy. More serious complications include radiation osteonecros ...
... In the vertebral column, the most benign changes are well seen by MRI and initially consist of marrow edema, followed by fatty replacement of the marrow. These changes can occur as soon as a few weeks after the cessation of radiation therapy. More serious complications include radiation osteonecros ...
Acceptance Testing and Quality Control of Dental Imaging
... It is important to properly perform tests for image quality and safety purposes right after the installation and during routine operation of a dental x-ray unit. Having a quality control (QC) program for dental x-ray facilities is instrumental in ensuring that patients are not receiving excessive ra ...
... It is important to properly perform tests for image quality and safety purposes right after the installation and during routine operation of a dental x-ray unit. Having a quality control (QC) program for dental x-ray facilities is instrumental in ensuring that patients are not receiving excessive ra ...
Prognostic value of gated myocardial perfusion SPECT. Shaw L
... improvement in outcome is achieved by linking high-risk SPECT measures to risk-reducing therapies. The optimal link is the specific event that the imaging modality identifies and the therapy applied which have also been shown to reduce outcomes. This concept of tailoring intervention based on the ex ...
... improvement in outcome is achieved by linking high-risk SPECT measures to risk-reducing therapies. The optimal link is the specific event that the imaging modality identifies and the therapy applied which have also been shown to reduce outcomes. This concept of tailoring intervention based on the ex ...
Specification And Acceptance Testing Of Computed
... CT systems for clinical medical physicists. The AAPM first addressed performance testing of CT systems with the publication of AAPM Report No. 1, “Phantoms for Performance Evaluation and Quality Assurance of CT Scanners”. Since publication of Report No. 1 in 1977, CT system designs have evolved and ...
... CT systems for clinical medical physicists. The AAPM first addressed performance testing of CT systems with the publication of AAPM Report No. 1, “Phantoms for Performance Evaluation and Quality Assurance of CT Scanners”. Since publication of Report No. 1 in 1977, CT system designs have evolved and ...
Evaluation of Linear Accelerator Gating with Real
... positions. The Task Group 75 guidelines state that the entrance dose per image can be as great as 0.2 cGy (18). For a 2-h session with imaging performed every 30 s, the patient would receive 48 cGy during the treatment course. Alternative image-based solutions have been investigated that use the on- ...
... positions. The Task Group 75 guidelines state that the entrance dose per image can be as great as 0.2 cGy (18). For a 2-h session with imaging performed every 30 s, the patient would receive 48 cGy during the treatment course. Alternative image-based solutions have been investigated that use the on- ...
MRI Accreditation Program Requirements
... phantom images and corresponding data for each unit. The acquisition of the phantom images involves the use of a designated MRI phantom appropriate to the unit or module listed on the application. Every unit must go through testing for the facility to be accredited. Since the origin of the ACR MRI A ...
... phantom images and corresponding data for each unit. The acquisition of the phantom images involves the use of a designated MRI phantom appropriate to the unit or module listed on the application. Every unit must go through testing for the facility to be accredited. Since the origin of the ACR MRI A ...
Imaging of Pulmonary Nodules
... Computed Tomography • Tomographs (slices) eliminate the problem of superimposed structures on radiographs • Volumetric data acquisition on modern scanners allows slice reconstruction in any plane • Highly sensitive for detection of pulmonary nodules as small as 1-2 mm • Unfortunately limited specifi ...
... Computed Tomography • Tomographs (slices) eliminate the problem of superimposed structures on radiographs • Volumetric data acquisition on modern scanners allows slice reconstruction in any plane • Highly sensitive for detection of pulmonary nodules as small as 1-2 mm • Unfortunately limited specifi ...
Quality Assurance for PET and PET/CT Systems
... concentration. Such tasks are crucial for early detection of lesions in whole body oncological PET as well as staging, follow-up and therapy monitoring in oncological PET. These tasks are also crucial for quantitation of radioactivity when assessing the response to therapy or quantitating the uptake ...
... concentration. Such tasks are crucial for early detection of lesions in whole body oncological PET as well as staging, follow-up and therapy monitoring in oncological PET. These tasks are also crucial for quantitation of radioactivity when assessing the response to therapy or quantitating the uptake ...
AIUM Practice Parameter for Ultrasonography in Reproductive
... be clearly defined. This area should be evaluated for the presence of free fluid or masses. When free fluid is detected, its echogenicity should be assessed. If a mass is detected, its size, position, shape, echogenicity, internal characteristics (cystic, solid, or complex), and relationship to the ...
... be clearly defined. This area should be evaluated for the presence of free fluid or masses. When free fluid is detected, its echogenicity should be assessed. If a mass is detected, its size, position, shape, echogenicity, internal characteristics (cystic, solid, or complex), and relationship to the ...
18F-FDOPA PET Imaging of Brain Tumors: Comparison Study with
... attenuation, 5-min transmission scans were acquired after the 18F-FDOPA and 18F-FDG emission scans for all patients. PET emission data corrected for photon attenuation, photon scatter, and random coincidences were reconstructed by use of iterative reconstruction with ordered-subset expectation maxim ...
... attenuation, 5-min transmission scans were acquired after the 18F-FDOPA and 18F-FDG emission scans for all patients. PET emission data corrected for photon attenuation, photon scatter, and random coincidences were reconstructed by use of iterative reconstruction with ordered-subset expectation maxim ...
Contrast-enhanced ultrasound for prostate cancer
... Prostate cancer is the number one non-skin malignancy of males in Western countries. In the U.S.A. and European Union combined, more than 500,000 men are diagnosed with prostate cancer each year, and more than 90,000 die of it [1,2]. In the U.S., 1 in 6 men will be diagnosed with prostate cancer in ...
... Prostate cancer is the number one non-skin malignancy of males in Western countries. In the U.S.A. and European Union combined, more than 500,000 men are diagnosed with prostate cancer each year, and more than 90,000 die of it [1,2]. In the U.S., 1 in 6 men will be diagnosed with prostate cancer in ...
Data Acquisition and Corrections
... are coded with “time marks” as they are received in sequence and stored as individual events as they occur. After the acquisition is completed, data can be manipulated to form images in a variety of ways to meet a specific need. This process is time consuming despite the wide flexibility it provides ...
... are coded with “time marks” as they are received in sequence and stored as individual events as they occur. After the acquisition is completed, data can be manipulated to form images in a variety of ways to meet a specific need. This process is time consuming despite the wide flexibility it provides ...
A splenic pseudotumor: An accessory spleen
... The cause of this was unknown, but probably because the mass compressed the splenic vessels and the arterial blood flow toward the proper spleen was somewhat reduced. Fourth, the mass included a cystic lesion. These features were quite uncharacteristic accessory spleen. The diagnosis of accessory sp ...
... The cause of this was unknown, but probably because the mass compressed the splenic vessels and the arterial blood flow toward the proper spleen was somewhat reduced. Fourth, the mass included a cystic lesion. These features were quite uncharacteristic accessory spleen. The diagnosis of accessory sp ...
Nuclear medicine
Nuclear medicine is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease. Nuclear medicine scans are usually conducted by radiographers. Nuclear medicine, in a sense, is ""radiology done inside out"" or ""endoradiology"" because it records radiation emitting from within the body rather than radiation that is generated by external sources like X-rays.