Radiation Safety for the Cardiac Sonographer
... the source (increasing distance exponentially reduces exposure) and using shielding. From the Nuclear Regulatory Commission.12 for prolonged periods of time. Because the volume of patients receiving radioisotopes for nuclear scans shortly preceding the performance of TTE has increased, this exposure ...
... the source (increasing distance exponentially reduces exposure) and using shielding. From the Nuclear Regulatory Commission.12 for prolonged periods of time. Because the volume of patients receiving radioisotopes for nuclear scans shortly preceding the performance of TTE has increased, this exposure ...
IAEA Training Material on Radiation Protection in - RPOP
... • Computed Tomography (CT) was introduced into clinical practice in 1972 and revolutionized X ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are therefore not superimposed on the image as they are in conventional projections • The techn ...
... • Computed Tomography (CT) was introduced into clinical practice in 1972 and revolutionized X ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are therefore not superimposed on the image as they are in conventional projections • The techn ...
DISP-2003: Introduction to Digital Signal Processing
... Direct display of disease process. Disadvantage: Poor image quality (~ 1 cm resolution) Why is resolution so poor? Very small concentrations of agent used for safety. - source within body Quantum limited: CT 109 photons/pixel Nuclear ~100 photons/pixel Tomographic systems: SPECT: single proton emiss ...
... Direct display of disease process. Disadvantage: Poor image quality (~ 1 cm resolution) Why is resolution so poor? Very small concentrations of agent used for safety. - source within body Quantum limited: CT 109 photons/pixel Nuclear ~100 photons/pixel Tomographic systems: SPECT: single proton emiss ...
Multimodality Molecular Imaging with Combined Optical and SPECT
... reflectance planar geometry for simplicity and speed. In fluorescence reflectance imaging (FRI), the light source and detector are on the same side of the sample, separated by appropriate emission filters that block the excitation light from the detector and admit fluorescence light. FRI is surface ...
... reflectance planar geometry for simplicity and speed. In fluorescence reflectance imaging (FRI), the light source and detector are on the same side of the sample, separated by appropriate emission filters that block the excitation light from the detector and admit fluorescence light. FRI is surface ...
National Ultrasound Curriculum for Medical Students
... cost. In addition, imaging with US does not carry the risks associated with the administration of intravenous contrast material or the potential hazards of ionizing radiation. Hence, many medical and surgical subspecialties are increasingly embracing the use of US, finding it to be an adjunct to or e ...
... cost. In addition, imaging with US does not carry the risks associated with the administration of intravenous contrast material or the potential hazards of ionizing radiation. Hence, many medical and surgical subspecialties are increasingly embracing the use of US, finding it to be an adjunct to or e ...
Fiducial Markers in Image-guided Radiotherapy
... marker techniques were originally developed in the preconformal radiotherapy era for positional verification of tissues that were not easily visualized using portal X-ray film imaging for patient alignment. Soft tissue structures that were relatively mobile could be more readily seen when radio-opaq ...
... marker techniques were originally developed in the preconformal radiotherapy era for positional verification of tissues that were not easily visualized using portal X-ray film imaging for patient alignment. Soft tissue structures that were relatively mobile could be more readily seen when radio-opaq ...
What do PET clinicians/researchers want? What can the PET
... NEC does not include local effects • Spatial resolution - variations within FOV ...
... NEC does not include local effects • Spatial resolution - variations within FOV ...
Impact of single photon emission tomography combined with
... Impact of single photon emission tomography combined with computed tomography (SPECT/CT) in pulmonary examinations — short review with two case reports Marina Garcheva Medical University-Sofia, Department of Nuclear Medicine [Received 9 I 2014; Accepted 7 VII 2014] ...
... Impact of single photon emission tomography combined with computed tomography (SPECT/CT) in pulmonary examinations — short review with two case reports Marina Garcheva Medical University-Sofia, Department of Nuclear Medicine [Received 9 I 2014; Accepted 7 VII 2014] ...
上海交通大学医学院 教 案 课程名称 Medical Imaging 2008年3月1日
... and the thickness of the scanned slice. Most CT units allow slice thickness specifications between 0.5 and 10 mm. Data for an individual slice, 360°tube rotation, are routinely acquired in 1 s or less. The advantages of CT compared with MR include rapid scan acquisition, superior bone detail, and de ...
... and the thickness of the scanned slice. Most CT units allow slice thickness specifications between 0.5 and 10 mm. Data for an individual slice, 360°tube rotation, are routinely acquired in 1 s or less. The advantages of CT compared with MR include rapid scan acquisition, superior bone detail, and de ...
Practice Guideline for the Performance of Functional
... The American College of Radiology, with more than 30,000 members, is the principal organization of radiologists, radiation oncologists, and clinical medical physicists in the United States. The College is a nonprofit professional society whose primary purposes are to advance the science of radiology ...
... The American College of Radiology, with more than 30,000 members, is the principal organization of radiologists, radiation oncologists, and clinical medical physicists in the United States. The College is a nonprofit professional society whose primary purposes are to advance the science of radiology ...
2017 Physician Procedure Code Changes
... Influenza virus vaccine quadrivalent (ccIIV4), derived from cell cultures, subunit,preservative and antibiotic free, 0.5 mL dosage, for IM use ...
... Influenza virus vaccine quadrivalent (ccIIV4), derived from cell cultures, subunit,preservative and antibiotic free, 0.5 mL dosage, for IM use ...
BME 50500: Image and Signal Processing in Biomedicine
... Disperse through the body according to biologic function. Meta-stable isotopes emit gamma rays in radioactive decay. Gamma rays are detected and converted into images as in x-ray CT. Images represent concentration of radiating isotopes in the body. Called emission tomography (as opposed to transmiss ...
... Disperse through the body according to biologic function. Meta-stable isotopes emit gamma rays in radioactive decay. Gamma rays are detected and converted into images as in x-ray CT. Images represent concentration of radiating isotopes in the body. Called emission tomography (as opposed to transmiss ...
The Influence of X-Ray Spectra Filtration on Image Quality
... reduced scan times, faster rotation speed and thinner slices leading to higher image quality. Moreover, recent developments in x-ray tube design allow to lower patient dose. The effective dose exposure of a typical CT examination is now between 1 and 20 mSv depending on the scan length and scan regi ...
... reduced scan times, faster rotation speed and thinner slices leading to higher image quality. Moreover, recent developments in x-ray tube design allow to lower patient dose. The effective dose exposure of a typical CT examination is now between 1 and 20 mSv depending on the scan length and scan regi ...
- Europhysics News
... However, in some situations using these similarity measurements for the registration of images may lead to misregistration. The reason for this is that criterion values may not take into account variations in the amount of contrast medium during angiography or the presence of a tumor in only one ima ...
... However, in some situations using these similarity measurements for the registration of images may lead to misregistration. The reason for this is that criterion values may not take into account variations in the amount of contrast medium during angiography or the presence of a tumor in only one ima ...
Medical Physics Department
... commission Unit 6 but problems with the dose rate stability, which do not affect traditional treatments, have to date prevented clinical release of this unit for VMAT treatments. Further details of this commissioning effort are described in the ...
... commission Unit 6 but problems with the dose rate stability, which do not affect traditional treatments, have to date prevented clinical release of this unit for VMAT treatments. Further details of this commissioning effort are described in the ...
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.