ACR–AAPM Technical Standard for Medical Physics Performance
... remain an important part of patient management. In recent years, a large number of other imaging techniques have been developed to improve the accuracy in the patient positioning/target verification process. Ultrasound and in-room computed tomography (CT) were two early methods for routine volumetri ...
... remain an important part of patient management. In recent years, a large number of other imaging techniques have been developed to improve the accuracy in the patient positioning/target verification process. Ultrasound and in-room computed tomography (CT) were two early methods for routine volumetri ...
Panoramic Dental X-ray
... Women should always inform their dentist or oral surgeon if there is any possibility that they are pregnant. Many imaging tests are not performed during pregnancy so as not to expose the fetus to radiation. If an x-ray is necessary, precautions will be taken to minimize radiation exposure to the bab ...
... Women should always inform their dentist or oral surgeon if there is any possibility that they are pregnant. Many imaging tests are not performed during pregnancy so as not to expose the fetus to radiation. If an x-ray is necessary, precautions will be taken to minimize radiation exposure to the bab ...
Aquilion PRIME - Toshiba Medical Systems Europe
... Multi. We were delighted to see that due to the short reconstruction time after only two months of using the PRIME our performance had increased to 40 scans during a 9-to-5 working day. It is a pleasure for radiologists and technicians alike to work on the post-processing station to produce magnific ...
... Multi. We were delighted to see that due to the short reconstruction time after only two months of using the PRIME our performance had increased to 40 scans during a 9-to-5 working day. It is a pleasure for radiologists and technicians alike to work on the post-processing station to produce magnific ...
Optimizing Abdominal MR Imaging: Approaches to Common Problems
... with zeros fills more points in k-space and interpolates the original data matrix to a higher matrix. This can decrease the number of sampled phase-encoding lines. Because no real information is added through this interpolation, there is only an apparent increase in spatial resolution, and SNR is lo ...
... with zeros fills more points in k-space and interpolates the original data matrix to a higher matrix. This can decrease the number of sampled phase-encoding lines. Because no real information is added through this interpolation, there is only an apparent increase in spatial resolution, and SNR is lo ...
Lecture 1 - Spinal Cord Sep 2013
... Plain Radiographs (x-rays) are usually the first series of images to be ordered by the physician. ...
... Plain Radiographs (x-rays) are usually the first series of images to be ordered by the physician. ...
State-of-the-art of Visualization in Post-Mortem Imaging
... overview of the entire body and the forensic pathologist can then selectively focus on different types of findings, such as the skeleton to localize fractures, the distribution of gas in the body or foreign objects such as metal fragments or bullets. This can provide essential information in the ear ...
... overview of the entire body and the forensic pathologist can then selectively focus on different types of findings, such as the skeleton to localize fractures, the distribution of gas in the body or foreign objects such as metal fragments or bullets. This can provide essential information in the ear ...
Image Guided Surgical Interventions
... in real-time, with and without the aid of contrast material. The disadvantages of radiograph imaging, however, include poor differentiation between soft tissue structures, ionizing irradiation, and 2-dimensional (2D) projection imaging, the latter being a significant limitation to navigating instrum ...
... in real-time, with and without the aid of contrast material. The disadvantages of radiograph imaging, however, include poor differentiation between soft tissue structures, ionizing irradiation, and 2-dimensional (2D) projection imaging, the latter being a significant limitation to navigating instrum ...
R30 - American College of Radiology
... acquired over a period of 60 minutes or until both the gallbladder (if present) and upper small bowel the proximal small intestine are clearly identified. identifiable constitute the baseline examination Dynamic acquisition of data (60 seconds per frame) is preferred since it may be useful for resol ...
... acquired over a period of 60 minutes or until both the gallbladder (if present) and upper small bowel the proximal small intestine are clearly identified. identifiable constitute the baseline examination Dynamic acquisition of data (60 seconds per frame) is preferred since it may be useful for resol ...
The Most Popular CT in the World
... institutions and physicians are being forced to reduce time to diagnosis and unnecessary hospitalization. To meet these and tomorrow’s demands for higher quality and cost-efficient healthcare, Siemens developed the SOMATOM Emotion. With both 6-slice and 16-slice configurations offering Siemens’ newe ...
... institutions and physicians are being forced to reduce time to diagnosis and unnecessary hospitalization. To meet these and tomorrow’s demands for higher quality and cost-efficient healthcare, Siemens developed the SOMATOM Emotion. With both 6-slice and 16-slice configurations offering Siemens’ newe ...
Multi-Slice CT Scanners
... broadly similar to those of a single slice scanner. There are, however, some important differences. Dose utilisation in the z-axis tends to be somewhat poorer on multi-slice than on single-slice scanners. This is mainly because the x-ray beam width is generally slightly broader than the total imaged ...
... broadly similar to those of a single slice scanner. There are, however, some important differences. Dose utilisation in the z-axis tends to be somewhat poorer on multi-slice than on single-slice scanners. This is mainly because the x-ray beam width is generally slightly broader than the total imaged ...
CT Imaging Using Monochromatic X-rays and Mosaic Crystals in the
... through significant angles by Bragg diffraction off crystal planes. Monochromatic X-rays produced by the Vanderbilt FEL must be deflected though 40º to pass from the source in the high radiation vault to a shirtsleeves imaging laboratory on the second floor of the Keck FEL facility. Such a large def ...
... through significant angles by Bragg diffraction off crystal planes. Monochromatic X-rays produced by the Vanderbilt FEL must be deflected though 40º to pass from the source in the high radiation vault to a shirtsleeves imaging laboratory on the second floor of the Keck FEL facility. Such a large def ...
I. Radiographic Terminology
... Special (Alternate) Projections Better demonstrate specific anatomic or certain pathology The patients who can’t cooperate fully ...
... Special (Alternate) Projections Better demonstrate specific anatomic or certain pathology The patients who can’t cooperate fully ...
annual report of the erwin l. hahn institute for magnetic resonance
... ameliorate the effects of inhomogeneities of both the static and radiofrequency magnetic fields. For example, we have looked at optimising the signal combinations from phased array coils, based on the SNR of GABA. This technique made it possible to increase the sensitivity for deeper voxels, like th ...
... ameliorate the effects of inhomogeneities of both the static and radiofrequency magnetic fields. For example, we have looked at optimising the signal combinations from phased array coils, based on the SNR of GABA. This technique made it possible to increase the sensitivity for deeper voxels, like th ...
Learn to identify and remedy artifacts in Computed Radiography
... for the film, which is replaced by an imaging plate that can be erased and reused for several years. Has technical advantadges over film radiography, as well as some extra possible pitfalls which must be properly watched for. ...
... for the film, which is replaced by an imaging plate that can be erased and reused for several years. Has technical advantadges over film radiography, as well as some extra possible pitfalls which must be properly watched for. ...
Radiation Safety - Society for Cardiovascular Angiography and
... within the patient) is directly related to the primary dose. Produced when the beam interacts with the patient. This constitutes noise and reduces image quality. Increases with field size and intensity of the X-ray beam ...
... within the patient) is directly related to the primary dose. Produced when the beam interacts with the patient. This constitutes noise and reduces image quality. Increases with field size and intensity of the X-ray beam ...
Y-90 SIRT in the Liver - Emory Radiology
... which requires right and left lobe tumor and liver volumes to be known Lobar dose in GBq = [(BSA – 0.2) + (% tumor involvement of lobe to be treated/100)] X [percent of total liver that treated lobe comprises] Then apply various correction factors. ...
... which requires right and left lobe tumor and liver volumes to be known Lobar dose in GBq = [(BSA – 0.2) + (% tumor involvement of lobe to be treated/100)] X [percent of total liver that treated lobe comprises] Then apply various correction factors. ...
SOMATOM Definition AS
... of the system settings is required from the operator. This becomes even more crucial, when the results need to be reproducible, especially when the system is being operated by multiple users. Unfortunately, ...
... of the system settings is required from the operator. This becomes even more crucial, when the results need to be reproducible, especially when the system is being operated by multiple users. Unfortunately, ...
MRI of the lung - European Society of Thoracic Imaging
... course of the bronchi within the consolidation [17, 18]. With progression of the disease, complete destruction of lung segments or lobes can occur with similar appearances on MRI and CT. Compared to CT, the strength of MRI is the additional assessment of “function”, i.e. perfusion, pulmonary hemodyn ...
... course of the bronchi within the consolidation [17, 18]. With progression of the disease, complete destruction of lung segments or lobes can occur with similar appearances on MRI and CT. Compared to CT, the strength of MRI is the additional assessment of “function”, i.e. perfusion, pulmonary hemodyn ...
- Asian Pacific Journal of Cancer Prevention
... be possible by combined T2 and DWI, number of positive biopsy cores and Gleason score (Naiki et al., 2011). Metastases of hilar and mediastinal lymph nodes are detected by CT or FDG-PET, but tiny metastatic lymph nodes are difficult to be detected by CT or FDG-PET, and it is sometimes difficult for ...
... be possible by combined T2 and DWI, number of positive biopsy cores and Gleason score (Naiki et al., 2011). Metastases of hilar and mediastinal lymph nodes are detected by CT or FDG-PET, but tiny metastatic lymph nodes are difficult to be detected by CT or FDG-PET, and it is sometimes difficult for ...
SERIES 0CONTRIBUTIONS FROM THE EUROPEAN RESPIRATORY MONOGRAPH0
... Positron emission tomography Positron emission tomography (PET) scanning is a new imaging modality whose role in the assessment of lung cancer is still being determined. Its advantage over other modalities lies in its sensitivity in detecting malignancy and its ability to image the entire body in on ...
... Positron emission tomography Positron emission tomography (PET) scanning is a new imaging modality whose role in the assessment of lung cancer is still being determined. Its advantage over other modalities lies in its sensitivity in detecting malignancy and its ability to image the entire body in on ...
Detection of Brain Metastases by 3
... who underwent MR imaging for screening of brain metastases at 3T, 14 patients (10 men and 4 women; mean age = 60.8 ± 13.8 years, range = 23-79 years) who had hyperintense lesions in the brain were eligible for the study. The primary tumors were 12 lung cancers and 2 breast cancers. Eleven patients h ...
... who underwent MR imaging for screening of brain metastases at 3T, 14 patients (10 men and 4 women; mean age = 60.8 ± 13.8 years, range = 23-79 years) who had hyperintense lesions in the brain were eligible for the study. The primary tumors were 12 lung cancers and 2 breast cancers. Eleven patients h ...
Computer-assisted detection of infectious lung diseases: A review
... underlying pathology and clinical variables [2]. ...
... underlying pathology and clinical variables [2]. ...
The SENSE ghost: Field-of-view restrictions for SENSE imaging
... direction, or sharper slice profiles in three-dimensional imaging may be employed. A combined acquisition/reconstruction method, called subencoding (2), was one of the first proposals made to reduce MRI times using multiple detectors. This concept was recently refined in other techniques for applicatio ...
... direction, or sharper slice profiles in three-dimensional imaging may be employed. A combined acquisition/reconstruction method, called subencoding (2), was one of the first proposals made to reduce MRI times using multiple detectors. This concept was recently refined in other techniques for applicatio ...
A Hand-Held, Intra-Operative Positron Imaging Probe for
... Beta probe (IPB). In the first version of the probe, we have utilized a SiPM array and CsI:Tl scintillator grown in the form of pixelated array to achieve position sensitivity [23]. In the current work, however, we present a novel beta probe that utilizes hybrid scintillator for improved SNR and imag ...
... Beta probe (IPB). In the first version of the probe, we have utilized a SiPM array and CsI:Tl scintillator grown in the form of pixelated array to achieve position sensitivity [23]. In the current work, however, we present a novel beta probe that utilizes hybrid scintillator for improved SNR and imag ...
Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.If the biologically active molecule chosen for PET is fluorodeoxyglucose (FDG), an analogue of glucose, the concentrations of tracer imaged will indicate tissue metabolic activity as it corresponds to the regional glucose uptake. Use of this tracer to explore the possibility of cancer metastasis (i.e., spreading to other sites) is the most common type of PET scan in standard medical care (90% of current scans). However, on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest. One of the disadvantages of PET scanners is their operating cost.