Draft Radiation Guideline 6 - Computed Tomography
... diagnosis and in research. Diagnostic medical procedures inevitably deliver a radiation dose to the patient. In most cases, the benefits of diagnostic radiology far outweigh any potential risks to the patient from radiation. However, the level of risk is justified only when patients receive a commen ...
... diagnosis and in research. Diagnostic medical procedures inevitably deliver a radiation dose to the patient. In most cases, the benefits of diagnostic radiology far outweigh any potential risks to the patient from radiation. However, the level of risk is justified only when patients receive a commen ...
On a novel approach to Compton scattered emission
... surface. Later on, it was shown that a true three-dimensional image can be reconstructed if there is a sufficient number of such two-dimensional projections generated by the displacement of the source/detector assembly on a specific space curve. In essence, this reconstruction procedure relies on th ...
... surface. Later on, it was shown that a true three-dimensional image can be reconstructed if there is a sufficient number of such two-dimensional projections generated by the displacement of the source/detector assembly on a specific space curve. In essence, this reconstruction procedure relies on th ...
CT Dose Measures
... • Effective dose takes into account where the radiation dose is being absorbed and radiosensitivity of the tissue irradiated • Estimates the equivalent whole-body dose from the absorbed dose • ED allows estimate of stochastic risks (cancer ...
... • Effective dose takes into account where the radiation dose is being absorbed and radiosensitivity of the tissue irradiated • Estimates the equivalent whole-body dose from the absorbed dose • ED allows estimate of stochastic risks (cancer ...
Radiation Safety in the Cath Lab
... Vary tube angle if possible to change skin exposed Position table & image receptor: x-ray tube close to pt increases dose; high image receptor incr. scatter Keep pt & operator body parts out of field of view Maximize shielding and distance from x-ray source for all personnel Manage and monitor dose ...
... Vary tube angle if possible to change skin exposed Position table & image receptor: x-ray tube close to pt increases dose; high image receptor incr. scatter Keep pt & operator body parts out of field of view Maximize shielding and distance from x-ray source for all personnel Manage and monitor dose ...
Pause and Pulse: Ten Steps That Help Manage Radiation Dose
... history, and assess the suitability of the fluoroscopic examination to the clinical situation. Foreknowledge of the clinical question to be answered is important in planning the most efficient examination, with the highest diagnostic yield at the lowest possible radiation dose. For example, if an up ...
... history, and assess the suitability of the fluoroscopic examination to the clinical situation. Foreknowledge of the clinical question to be answered is important in planning the most efficient examination, with the highest diagnostic yield at the lowest possible radiation dose. For example, if an up ...
Brochure
... process the data by selecting the voxel as per individual requirements. In addition to these characteristics, users also benefit from faster examination and data transmission, allowing analysis of results in record time ...
... process the data by selecting the voxel as per individual requirements. In addition to these characteristics, users also benefit from faster examination and data transmission, allowing analysis of results in record time ...
Rotational angiography in repeat atrial fibrillation
... acquired on the Innova* interventional X-ray system from GE Healthcare. The rotational images replace the CT images used previously for mapping. Cardiologist Tom De Potter observes that the technique may help minimize radiation exposure and improve clinical confidence by revealing the precise locati ...
... acquired on the Innova* interventional X-ray system from GE Healthcare. The rotational images replace the CT images used previously for mapping. Cardiologist Tom De Potter observes that the technique may help minimize radiation exposure and improve clinical confidence by revealing the precise locati ...
Radiology - Network Learning Institute
... – Some policies allow for deep hyperthermia with radiation therapy while considering superficial hyperthermia investigational ...
... – Some policies allow for deep hyperthermia with radiation therapy while considering superficial hyperthermia investigational ...
Imaging strategies to reduce the risk of radiation in CT studies
... CT examination (18,19). Although the form of radiation delivered by atomic bombs (gamma radiation) is different from that used in radiology (x-radiation), there is fundamentally no difference in the carcinogenic potential (4). The average number of CT scans conducted for a given medical problem is t ...
... CT examination (18,19). Although the form of radiation delivered by atomic bombs (gamma radiation) is different from that used in radiology (x-radiation), there is fundamentally no difference in the carcinogenic potential (4). The average number of CT scans conducted for a given medical problem is t ...
Risks and benefits of cardiac imaging: an analysis of risks
... agents in 0.03– 0.2% of patients.34,35 Most reactions are mild (rash, urticaria). Severe, life-threatening reactions (respiratory distress, cardiopulmonary arrest) are extremely rare: only 33 reactions after 687 000 doses36 and very few of them fatal reactions.37 In the present analysis, we estimate ...
... agents in 0.03– 0.2% of patients.34,35 Most reactions are mild (rash, urticaria). Severe, life-threatening reactions (respiratory distress, cardiopulmonary arrest) are extremely rare: only 33 reactions after 687 000 doses36 and very few of them fatal reactions.37 In the present analysis, we estimate ...
Innovation, value and quantitation in a patient-centric
... we can capture all the axial scans that previously took 30 minutes to acquire. These days your PET scanner might be built into an MR. With time-of-flight PET, we get boosts in spatial resolution and speed. In CT, we can substantially lower dose with iterative reconstruction and by tuning to lower kV ...
... we can capture all the axial scans that previously took 30 minutes to acquire. These days your PET scanner might be built into an MR. With time-of-flight PET, we get boosts in spatial resolution and speed. In CT, we can substantially lower dose with iterative reconstruction and by tuning to lower kV ...
University Hospital Geneva uses PET/MR in
... PET/CT and an MRI as part of their clinical workup. “In patients with head and neck cancers, for instance, anatomical exams for pre-op, postop and post-treatment are very complex, so PET/CT alone is usually not enough, and most patients will also get an MR exam in addition. Now they can have both PE ...
... PET/CT and an MRI as part of their clinical workup. “In patients with head and neck cancers, for instance, anatomical exams for pre-op, postop and post-treatment are very complex, so PET/CT alone is usually not enough, and most patients will also get an MR exam in addition. Now they can have both PE ...
A COMPARISON OF IMAGE QUALITY AND RADIATION DOSE
... • The diagnostic information provided by modern digital detectors can be equal or superior to conventional screen-film systems, with comparable patient doses. • Digital imaging has practical technical advantages compared with film techniques, e.g. wide contrast dynamic range, post-processing functi ...
... • The diagnostic information provided by modern digital detectors can be equal or superior to conventional screen-film systems, with comparable patient doses. • Digital imaging has practical technical advantages compared with film techniques, e.g. wide contrast dynamic range, post-processing functi ...
MI 001 - Specific Criteria for Medical Imaging, Oct 2014
... The following details the requirements of other personnel working in a radiology service: Nurses – Each nurse shall hold current registration with the Singapore Nurses Board. Nurses involved in medical imaging practice shall have adequate training/experience in such practice. Facilities shall mainta ...
... The following details the requirements of other personnel working in a radiology service: Nurses – Each nurse shall hold current registration with the Singapore Nurses Board. Nurses involved in medical imaging practice shall have adequate training/experience in such practice. Facilities shall mainta ...
Clinical Applications of Cone-Beam Computed Tomography in
... are acquired using a narrow fan-shaped x-ray beam transmitted through the patient. The patient is imaged slice-byslice, usually in the axial plane, and interpretation of the images is achieved by stacking the slices to obtain multiple 2D representations. The linear array of detector elements used in ...
... are acquired using a narrow fan-shaped x-ray beam transmitted through the patient. The patient is imaged slice-byslice, usually in the axial plane, and interpretation of the images is achieved by stacking the slices to obtain multiple 2D representations. The linear array of detector elements used in ...
2009
... procedure to be successful, the doctors must know the precise location and distribution of temperature in the tumor and that’s where the physicists come in the picture,‖ explains R. Jason Stafford, Ph.D., assistant professor in Imaging Physics, and lead consultant on the Visualase technology develop ...
... procedure to be successful, the doctors must know the precise location and distribution of temperature in the tumor and that’s where the physicists come in the picture,‖ explains R. Jason Stafford, Ph.D., assistant professor in Imaging Physics, and lead consultant on the Visualase technology develop ...
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.