1) Radiation Protection - NHS Scotland Recruitment
... 1.9. Perform dosimetric calculations for all studies submitted to NHS Tayside through the IRAS system. In order to carry out this role the post holder will require a clear knowledge and understanding of the conflicting and contrasting radiographic and fluoroscopic techniques applied to individual ty ...
... 1.9. Perform dosimetric calculations for all studies submitted to NHS Tayside through the IRAS system. In order to carry out this role the post holder will require a clear knowledge and understanding of the conflicting and contrasting radiographic and fluoroscopic techniques applied to individual ty ...
Calculation of inertial properties of the malleus
... The microscale X-ray computed tomography (micro-CT) scanner provides nondestructive imaging with resolution as small as 10 µm resolution. The first application of the micro-CT to obtain the general geometry of the middle ear bones [Decraemer et al. 2003; Lane et al. 2004; 2005] found more clarity th ...
... The microscale X-ray computed tomography (micro-CT) scanner provides nondestructive imaging with resolution as small as 10 µm resolution. The first application of the micro-CT to obtain the general geometry of the middle ear bones [Decraemer et al. 2003; Lane et al. 2004; 2005] found more clarity th ...
- sicot-j
... orthopedic surgeons working in Turkey about fluoroscopic imaging as it is frequently used in orthopedics. However, operating with an X-ray can cause some acute and chronic problems. This study also investigated the safety measures employed by orthopedic surgeons during the use of fluoroscopy. Since ...
... orthopedic surgeons working in Turkey about fluoroscopic imaging as it is frequently used in orthopedics. However, operating with an X-ray can cause some acute and chronic problems. This study also investigated the safety measures employed by orthopedic surgeons during the use of fluoroscopy. Since ...
Inside Biograph TruePoint PET•CT
... from the center of the field of view (FOV),the line of response (LOR) is likely to be correctly localized in the crystal in which the photon entered. The further away from the center of the FOV, the less likely the LOR will be calculated correctly because the photon will hit the crystal on an angle ...
... from the center of the field of view (FOV),the line of response (LOR) is likely to be correctly localized in the crystal in which the photon entered. The further away from the center of the FOV, the less likely the LOR will be calculated correctly because the photon will hit the crystal on an angle ...
Comparison of Patient Localization Accuracy Between Stereotactic
... The general acceptable imaging dose management is represented by the acronym ALALA. We should use IGRT devices with acceptable effective dose without reducing the image information. For diagnostic image, the relationship between exposure condition and image quality is trade it off. To gain high cont ...
... The general acceptable imaging dose management is represented by the acronym ALALA. We should use IGRT devices with acceptable effective dose without reducing the image information. For diagnostic image, the relationship between exposure condition and image quality is trade it off. To gain high cont ...
Notes on Computerized Tomography
... So what are the reasons for using CT rather than a traditional X-ray? There are primarily three reasons. When we look at a chest X-ray (Figure 1.1), certain anatomic features are immediately apparent. For example, the ribs show up as light structures because they attenuate the X-ray beam more strong ...
... So what are the reasons for using CT rather than a traditional X-ray? There are primarily three reasons. When we look at a chest X-ray (Figure 1.1), certain anatomic features are immediately apparent. For example, the ribs show up as light structures because they attenuate the X-ray beam more strong ...
DoseWatch - GE Healthcare
... out the “How?” for the rest of the journey may seem daunting. Effective patient radiation dose tracking and optimization requires comprehensive and complete data collection. Many healthcare providers face a formidable task – gathering and aggregating information across multiple modalities and device ...
... out the “How?” for the rest of the journey may seem daunting. Effective patient radiation dose tracking and optimization requires comprehensive and complete data collection. Many healthcare providers face a formidable task – gathering and aggregating information across multiple modalities and device ...
CR_DR State X-ray Inspection Protocol
... Note 2: In your evaluation of techniques used at a facility, pay close attention to what kVp shows up on the control panel when a selection is made for an AP phototimed LS or AB. Determine from interviewing the chief technologist as well as other technologists if everyone is USING the default kVp s ...
... Note 2: In your evaluation of techniques used at a facility, pay close attention to what kVp shows up on the control panel when a selection is made for an AP phototimed LS or AB. Determine from interviewing the chief technologist as well as other technologists if everyone is USING the default kVp s ...
On a novel approach to Compton scattered emission
... question: is scattered radiation any good for imaging? As early as 2001, we have observed that scattered radiation images of an object may be sorted out at a given energy (or λ = λ0 + ...
... question: is scattered radiation any good for imaging? As early as 2001, we have observed that scattered radiation images of an object may be sorted out at a given energy (or λ = λ0 + ...
Document
... • Standard Deviation (SD) is a measurement of image noise. •It indicates the CT value deviation around the mean value. •The higher the value the greater the noise level ...
... • Standard Deviation (SD) is a measurement of image noise. •It indicates the CT value deviation around the mean value. •The higher the value the greater the noise level ...
Diagnostic reference levels as a quality assurance tool
... to establish that the doses are acceptable when compared with published DRL.” It also recommends that accrediting bodies such as RANZCR and the Australian Council on Healthcare Standards consider including compliance with DRL for a core set of examinations. If the radiology department observes dose ...
... to establish that the doses are acceptable when compared with published DRL.” It also recommends that accrediting bodies such as RANZCR and the Australian Council on Healthcare Standards consider including compliance with DRL for a core set of examinations. If the radiology department observes dose ...
Making the difference with Philips Live Image
... Rock stable gantry design with fast and easy table side controlled operation, with full flexibility in applications by free positioning of the gantry, monitor suspension and operating modules. The exclusive BodyGuard patient protection mechanism is designed to protect the patient from unexpected c ...
... Rock stable gantry design with fast and easy table side controlled operation, with full flexibility in applications by free positioning of the gantry, monitor suspension and operating modules. The exclusive BodyGuard patient protection mechanism is designed to protect the patient from unexpected c ...
RESOURCE LETTER Resource Letter MP-2: Medical Physics
... The references in this subsection apply to all of these imaging modalities. Later subsections give references specific to each modality. Tomography is derived from the Greek tomos, meaning slice. Tomography was originally a technique in which the film and x-ray tube were rotated about a point or lin ...
... The references in this subsection apply to all of these imaging modalities. Later subsections give references specific to each modality. Tomography is derived from the Greek tomos, meaning slice. Tomography was originally a technique in which the film and x-ray tube were rotated about a point or lin ...
Code of Practice for Diagnostic and Interventional Radiology: Draft
... Secondary shielding – 1.5 mm lead equivalence in X-ray rooms where computed tomography equipment is performed, 18 mm gypsum plasterboard equivalence in all X-ray rooms where mammography or dual energy X-ray absorptiometry is performed and 1.0 mm lead equivalence for all other X-ray rooms. Supervised ...
... Secondary shielding – 1.5 mm lead equivalence in X-ray rooms where computed tomography equipment is performed, 18 mm gypsum plasterboard equivalence in all X-ray rooms where mammography or dual energy X-ray absorptiometry is performed and 1.0 mm lead equivalence for all other X-ray rooms. Supervised ...
Code of Practice for Diagnostic and Interventional Radiology: Draft
... Secondary shielding – 1.5 mm lead equivalence in X-ray rooms where computed tomography equipment is performed, 18 mm gypsum plasterboard equivalence in all X-ray rooms where mammography or dual energy X-ray absorptiometry is performed and 1.0 mm lead equivalence for all other X-ray rooms. Supervised ...
... Secondary shielding – 1.5 mm lead equivalence in X-ray rooms where computed tomography equipment is performed, 18 mm gypsum plasterboard equivalence in all X-ray rooms where mammography or dual energy X-ray absorptiometry is performed and 1.0 mm lead equivalence for all other X-ray rooms. Supervised ...
- Braincon
... simultaneous visibility of the thinnest regions (cervical spine) as well as the thickest ones (scapula-thoracic area, lower lumbar spine, pelvis) (Fig. 5a, b). Absence of parallax explains the lack of distortion of the anatomical structures. At last, with an appropriate software and a ‘‘bone morphin ...
... simultaneous visibility of the thinnest regions (cervical spine) as well as the thickest ones (scapula-thoracic area, lower lumbar spine, pelvis) (Fig. 5a, b). Absence of parallax explains the lack of distortion of the anatomical structures. At last, with an appropriate software and a ‘‘bone morphin ...
2 Quality Control of a Simulator
... • Implanted markers: These markers can be observed in MV images provided that there are a sufficient number of these, the location and orientation of the organ in which they are embedded can be determined. Markers have been used widely for prostate treatments. ...
... • Implanted markers: These markers can be observed in MV images provided that there are a sufficient number of these, the location and orientation of the organ in which they are embedded can be determined. Markers have been used widely for prostate treatments. ...
Radiation safety and CT dose
... Right dose Adhere to ALARA Adhere to Image Gently and Image Wisely guidelines Provide reference doses, with ranges, to MDs and techs, based on anatomy, study purpose and pt size Radiologists should ensure that the proper dosing is in place for the patient being treated Annual or bi-annual ...
... Right dose Adhere to ALARA Adhere to Image Gently and Image Wisely guidelines Provide reference doses, with ranges, to MDs and techs, based on anatomy, study purpose and pt size Radiologists should ensure that the proper dosing is in place for the patient being treated Annual or bi-annual ...
Introducing Radiology Select: Radiation Dose and Dose Reduction
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
j32-2003-ieeetmi-gradient
... setup, which usually indicates the position of the patient on the operating table (e.g., supine, on the side) and the C-arm imaging views (e.g., anterior-posterior, lateral); 2) intraoperatively, by having the surgeon touch implanted fiducials or by acquiring landmark points on the anatomy surface w ...
... setup, which usually indicates the position of the patient on the operating table (e.g., supine, on the side) and the C-arm imaging views (e.g., anterior-posterior, lateral); 2) intraoperatively, by having the surgeon touch implanted fiducials or by acquiring landmark points on the anatomy surface w ...
CARDIAC CATHETERIZATION EQUIPMENT PERFORMANCE AAPM REPORT NO. 70 Report of Task Group #17
... Three types of x-ray generators have been and continue to be sold for cardiac cath labs: three-phase mA switched, three-phase kVp switched, and high-frequency inverter units. Regardless of the type purchased, the generator should be capable of generating 80 to 100 kilowatts (kW) of power (Rauch and ...
... Three types of x-ray generators have been and continue to be sold for cardiac cath labs: three-phase mA switched, three-phase kVp switched, and high-frequency inverter units. Regardless of the type purchased, the generator should be capable of generating 80 to 100 kilowatts (kW) of power (Rauch and ...
X-ray
X-radiation (composed of X-rays) is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to with terms meaning Röntgen radiation, after Wilhelm Röntgen, who is usually credited as its discoverer, and who had named it X-radiation to signify an unknown type of radiation. Spelling of X-ray(s) in the English language includes the variants x-ray(s), xray(s) and X ray(s).X-rays with photon energies above 5–10 keV (below 0.2–0.1 nm wavelength) are called hard X-rays, while those with lower energy are called soft X-rays. Due to their penetrating ability, hard X-rays are widely used to image the inside of objects, e.g., in medical radiography and airport security. As a result, the term X-ray is metonymically used to refer to a radiographic image produced using this method, in addition to the method itself. Since the wavelengths of hard X-rays are similar to the size of atoms they are also useful for determining crystal structures by X-ray crystallography. By contrast, soft X-rays are easily absorbed in air and the attenuation length of 600 eV (~2 nm) X-rays in water is less than 1 micrometer.There is no universal consensus for a definition distinguishing between X-rays and gamma rays. One common practice is to distinguish between the two types of radiation based on their source: X-rays are emitted by electrons, while gamma rays are emitted by the atomic nucleus. This definition has several problems; other processes also can generate these high energy photons, or sometimes the method of generation is not known. One common alternative is to distinguish X- and gamma radiation on the basis of wavelength (or equivalently, frequency or photon energy), with radiation shorter than some arbitrary wavelength, such as 10−11 m (0.1 Å), defined as gamma radiation.This criterion assigns a photon to an unambiguous category, but is only possible if wavelength is known. (Some measurement techniques do not distinguish between detected wavelengths.) However, these two definitions often coincide since the electromagnetic radiation emitted by X-ray tubes generally has a longer wavelength and lower photon energy than the radiation emitted by radioactive nuclei.Occasionally, one term or the other is used in specific contexts due to historical precedent, based on measurement (detection) technique, or based on their intended use rather than their wavelength or source.Thus, gamma-rays generated for medical and industrial uses, for example radiotherapy, in the ranges of 6–20 MeV, can in this context also be referred to as X-rays.