High-resolution investigation of spinal cord and spine
... success in small animal ex-vivo and in vivo models [33-36]. Micro-CT provides spatial resolution on micro-scale (5–50µm) (micro-CT) and nano-scale (~100 nanometres) (nano-CT) [35, 37-38] levels and micro-scale features can be readily resolved in opaque samples with dimensions measured from mm to cm ...
... success in small animal ex-vivo and in vivo models [33-36]. Micro-CT provides spatial resolution on micro-scale (5–50µm) (micro-CT) and nano-scale (~100 nanometres) (nano-CT) [35, 37-38] levels and micro-scale features can be readily resolved in opaque samples with dimensions measured from mm to cm ...
ACR–ASTRO Practice Parameter for the Performance of Stereotactic
... for patients. Practice Parameters and Technical Standards are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating m ...
... for patients. Practice Parameters and Technical Standards are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating m ...
Quantitative assessment of scatter correction techniques
... and fast acquisition speed. Dual-source CT (DSCT) imaging can now provide anatomical, functional, and quantitative information about the lung. CT technology has rapidly evolved from its introduction in the medical field in the early 1970s, and its development through the decades has produced a profo ...
... and fast acquisition speed. Dual-source CT (DSCT) imaging can now provide anatomical, functional, and quantitative information about the lung. CT technology has rapidly evolved from its introduction in the medical field in the early 1970s, and its development through the decades has produced a profo ...
Equipment Specifications
... - A reader with system features high-quality image plate processing, a high-speed cassette-feeder and unique configuration flexibility: from multi-reader, multi-terminal configurations to high-speed network communication. It must have preview capability, throughput of at least 80 cassettes/hour, for ...
... - A reader with system features high-quality image plate processing, a high-speed cassette-feeder and unique configuration flexibility: from multi-reader, multi-terminal configurations to high-speed network communication. It must have preview capability, throughput of at least 80 cassettes/hour, for ...
Effect of Backscattered Radiation on X
... anatomical structures under examination, and the receptor contrast which refers to the contrast produced as a result of the X-ray image receptor being employed (Bushong,2013). To detect diagnostic radiograph details, a lesion must transmit a different X-ray beam intensity compared with the surroundi ...
... anatomical structures under examination, and the receptor contrast which refers to the contrast produced as a result of the X-ray image receptor being employed (Bushong,2013). To detect diagnostic radiograph details, a lesion must transmit a different X-ray beam intensity compared with the surroundi ...
Patient Dose in common CT examinations-2003
... widely used CT Dose Quantity is the computed tomography dose index (CTDI), which integrates the long axis dose profile resulting from a single slice rotation of the x-ray tube. Another important dose quantity is the Dose Length Product (DLP), which includes the patient, or the phantom volume irradia ...
... widely used CT Dose Quantity is the computed tomography dose index (CTDI), which integrates the long axis dose profile resulting from a single slice rotation of the x-ray tube. Another important dose quantity is the Dose Length Product (DLP), which includes the patient, or the phantom volume irradia ...
reduced radiation exposure and iodine load at low tube kilovoltage
... to minimize the risk of developing radiationinduced cancers during later life. There are several reviews that have recently been published on various tools that can be used to reduce patient exposure from CT [22–26] . The applicability of these low-dose tools is highly dependent on the patients’ cha ...
... to minimize the risk of developing radiationinduced cancers during later life. There are several reviews that have recently been published on various tools that can be used to reduce patient exposure from CT [22–26] . The applicability of these low-dose tools is highly dependent on the patients’ cha ...
Imaging in Pregnant Patients
... continues to be examination appropriateness when imaging pregnant patients. With the multitude of references on potential radiation risks to the fetus, radiologists tend to be cautious and hesitant about exposing the fetus to radiation. This tendency is often interpreted by referring physicians as i ...
... continues to be examination appropriateness when imaging pregnant patients. With the multitude of references on potential radiation risks to the fetus, radiologists tend to be cautious and hesitant about exposing the fetus to radiation. This tendency is often interpreted by referring physicians as i ...
ACR–SPR Practice Guideline for the Performance of Computed
... has been subjected to extensive review, requiring the approval of the Commission on Quality and Safety as well as the ACR Board of Chancellors, the ACR Council Steering Committee, and the ACR Council. The practice guidelines and technical standards recognize that the safe and effective use of diagno ...
... has been subjected to extensive review, requiring the approval of the Commission on Quality and Safety as well as the ACR Board of Chancellors, the ACR Council Steering Committee, and the ACR Council. The practice guidelines and technical standards recognize that the safe and effective use of diagno ...
Diagnostic Radiology Residents Physics Curriculum 2009
... 3. Indentify how photons are attenuated (i.e., absorbed and scattered) within a material and the terms used to characterize the attenuation. Clinical Application: 1. Identify which photon interactions are dominant for each of the following imaging modalities: mammography, projection radiography, flu ...
... 3. Indentify how photons are attenuated (i.e., absorbed and scattered) within a material and the terms used to characterize the attenuation. Clinical Application: 1. Identify which photon interactions are dominant for each of the following imaging modalities: mammography, projection radiography, flu ...
Image Quality and Dose Comparison between
... Siemens spiral CT – kV 120, mAs 84 current UNCH Protocol for sinus imaging/surgical planning ...
... Siemens spiral CT – kV 120, mAs 84 current UNCH Protocol for sinus imaging/surgical planning ...
Do Community Hospitals Need Dual-Energy CT?
... hospitals experimenting with dual-energy CT (DECT). Over the past decade, they have identified specific DECT applications. During this time, however, capabilities found on advanced conventional CTs have migrated to mid-tier products, boosting efficiency and dramatically lowering patient radiation. ...
... hospitals experimenting with dual-energy CT (DECT). Over the past decade, they have identified specific DECT applications. During this time, however, capabilities found on advanced conventional CTs have migrated to mid-tier products, boosting efficiency and dramatically lowering patient radiation. ...
What is the definition of albedo?
... source of x-rays, which resulted in sharper images. The tube had a third electrode, an anticathode connected to the anode. It improved the X-ray output, but the method by which it achieved this is not understood. A more common arrangement used a cupped plate anticathode (similar in constriction to t ...
... source of x-rays, which resulted in sharper images. The tube had a third electrode, an anticathode connected to the anode. It improved the X-ray output, but the method by which it achieved this is not understood. A more common arrangement used a cupped plate anticathode (similar in constriction to t ...
Special procedures and techniques in radiotherapy
... Bilateral Total Body Irradiation Sagittal laser or floor marks to define setup distance ...
... Bilateral Total Body Irradiation Sagittal laser or floor marks to define setup distance ...
ACR–AAPM Technical Standard for Medical Physics Performance
... Imaging has been used to verify the patient position since the earliest days of external beam radiation therapy (EBRT). The first methods of imaging internal anatomy to verify the patient’s position on the treatment couch used the treatment beam to expose radiographic film. These images are called p ...
... Imaging has been used to verify the patient position since the earliest days of external beam radiation therapy (EBRT). The first methods of imaging internal anatomy to verify the patient’s position on the treatment couch used the treatment beam to expose radiographic film. These images are called p ...
Spring 2014
... teletherapy heads and three multileaf collimators, as well as a split-magnet MRI system for soft-tissue imaging. ...
... teletherapy heads and three multileaf collimators, as well as a split-magnet MRI system for soft-tissue imaging. ...
Multiply Your Potential
... of excited Flash users is continuously growing – not least because current Flash users are already purchasing their second, third, fourth, and even up to tenth system. The latest Dual Source Dual Energy CT scanner has the fastest volume acquisition speed and highest heart rate-independent temporal r ...
... of excited Flash users is continuously growing – not least because current Flash users are already purchasing their second, third, fourth, and even up to tenth system. The latest Dual Source Dual Energy CT scanner has the fastest volume acquisition speed and highest heart rate-independent temporal r ...
Digital radiography detectors e A technical overview: Part 1
... energy level (Fig. 2c and d). This light is collected by photodiodes and converted into electric charge while an analog-to-digital device converts it into a corresponding digital image. Fig. 3 shows the SPS scanning process. Finally, the third step of the basic CR imaging cycle is the Residual Signa ...
... energy level (Fig. 2c and d). This light is collected by photodiodes and converted into electric charge while an analog-to-digital device converts it into a corresponding digital image. Fig. 3 shows the SPS scanning process. Finally, the third step of the basic CR imaging cycle is the Residual Signa ...
Study on the Computed Tomography Dose Index volume
... Majority examinations of multi slice CT scan are performed in helical mode and issues regarding dose still an area of some debate on these system especially for those who had repeated CT examinations since the effective dose from CT scan on average is ~10 mSv [1]. Therefore, once a CT examination is ...
... Majority examinations of multi slice CT scan are performed in helical mode and issues regarding dose still an area of some debate on these system especially for those who had repeated CT examinations since the effective dose from CT scan on average is ~10 mSv [1]. Therefore, once a CT examination is ...
Functional Lung Imaging in Thoracic Cancer Radiotherapy
... is common in lung cancer patients. Because they typically have diminished pulmonary reserve, radiation sequelae such as pneumonitis or fibrosis can be highly morbid or even fatal. Analogously to the lung, radiation dose constraints are placed on other critical structures such as the spinal cord, hea ...
... is common in lung cancer patients. Because they typically have diminished pulmonary reserve, radiation sequelae such as pneumonitis or fibrosis can be highly morbid or even fatal. Analogously to the lung, radiation dose constraints are placed on other critical structures such as the spinal cord, hea ...
application/msword
... healthcare, homeland security and industrial quality assessment. The system consists of Intelligent Imaging Sensors, combined with state-of-the-art in digital radiographic imaging with a unique feedback mechanism which is able to optimise the image acquisition procedure for a given set of dose and t ...
... healthcare, homeland security and industrial quality assessment. The system consists of Intelligent Imaging Sensors, combined with state-of-the-art in digital radiographic imaging with a unique feedback mechanism which is able to optimise the image acquisition procedure for a given set of dose and t ...
R28 - American College of Radiology
... intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating medical specialty societies caution against the use of these documents in litigation in which the clinical decisions of a pr ...
... intended, nor should they be used, to establish a legal standard of care1. For these reasons and those set forth below, the American College of Radiology and our collaborating medical specialty societies caution against the use of these documents in litigation in which the clinical decisions of a pr ...
article in press - The EndoExperience
... some limitations on the use of the effective dose. A study by Ludlow et al. shows a good overall reproducibility (2.5% variation between repeated identical examinations), although some specific TLD locations showed a large variation [11]. It is clear that effective dose estimations are dependent on ...
... some limitations on the use of the effective dose. A study by Ludlow et al. shows a good overall reproducibility (2.5% variation between repeated identical examinations), although some specific TLD locations showed a large variation [11]. It is clear that effective dose estimations are dependent on ...
Wake Radiology Expands Pediatric Imaging
... A Parent’s guide to radiation risk Ionizing radiation is the type of energy used to create images for x-rays, CT scans, nuclear medicine exams, and fluoroscopic studies. These images can be enormously useful to your child’s doctors to help diagnose medical or surgical problems. There is some risk, ...
... A Parent’s guide to radiation risk Ionizing radiation is the type of energy used to create images for x-rays, CT scans, nuclear medicine exams, and fluoroscopic studies. These images can be enormously useful to your child’s doctors to help diagnose medical or surgical problems. There is some risk, ...
The Benefits of Dual-Energy Subtraction Radiography of the Chest
... did. To be experienced, you need to have had full responsibility for everything you do and that has not happened yet. At this point, you are Entry Level ready. There is still so much more to learn and refine. Those 10 words are self-aggrandizing. Your references may use them to describe you, but if ...
... did. To be experienced, you need to have had full responsibility for everything you do and that has not happened yet. At this point, you are Entry Level ready. There is still so much more to learn and refine. Those 10 words are self-aggrandizing. Your references may use them to describe you, but if ...
Backscatter X-ray
Backscatter X-ray is an advanced X-ray imaging technology. Traditional X-ray machines detect hard and soft materials by the variation in transmission through the target. In contrast, backscatter X-ray detects the radiation that reflects from the target. It has potential applications where less-destructive examination is required, and can be used if only one side of the target is available for examination.The technology is one of two types of whole body imaging technologies that have been used to perform full-body scans of airline passengers to detect hidden weapons, tools, liquids, narcotics, currency, and other contraband. A competing technology is millimeter wave scanner. An airport security machine of this type is also referred to as ""body scanner"", ""whole body imager (WBI)"", ""security scanner"", and ""naked scanner"".