Conference of Radiation Control Program Directors (CRCPD) Suggested State Regulations, Part F.11 (PDF)
... "Heat unit" means a unit of energy equal to the product of the peak kilovoltage, milliamperes, and seconds, i.e., kVp x mA x second. "HVL" (See "Half-value layer"). "Image intensifier" means a device, installed in its housing, which instantaneously converts an x-ray pattern into a corresponding ligh ...
... "Heat unit" means a unit of energy equal to the product of the peak kilovoltage, milliamperes, and seconds, i.e., kVp x mA x second. "HVL" (See "Half-value layer"). "Image intensifier" means a device, installed in its housing, which instantaneously converts an x-ray pattern into a corresponding ligh ...
Anterior Segment Optical Coherence Tomography Guided Nd:YAG
... Secondary iris cysts can develop after intraocular surgery, trauma, inflammation, or prolonged use of topical miotics or prostaglandins (Shields et al., 1984; Rao et al., 2011). Post traumatic iris cysts follow implantation of epithelium into the anterior chamber. These cells proliferate, involve ad ...
... Secondary iris cysts can develop after intraocular surgery, trauma, inflammation, or prolonged use of topical miotics or prostaglandins (Shields et al., 1984; Rao et al., 2011). Post traumatic iris cysts follow implantation of epithelium into the anterior chamber. These cells proliferate, involve ad ...
Monte Carlo simulations in emission tomography and GATE: An
... [18], without jeopardizing the accuracy of the simulated data. The main issue related to the use of such techniques is that they strongly alter the statistical properties of simulated data [18]. The only way to get realistic data from a statistical point of view therefore consists in simulating almo ...
... [18], without jeopardizing the accuracy of the simulated data. The main issue related to the use of such techniques is that they strongly alter the statistical properties of simulated data [18]. The only way to get realistic data from a statistical point of view therefore consists in simulating almo ...
Exclusion of Unstable Cervical Spine Injury in Obtunded Patients
... with blunt trauma adds to multi– detector row computed tomography (CT) of the entire cervical spine (including routine multiplanar sagittal and coronal reformations) when the CT findings are normal. MATERIALS AND METHODS: The study was HIPAA compliant and institutional review board approved. Informe ...
... with blunt trauma adds to multi– detector row computed tomography (CT) of the entire cervical spine (including routine multiplanar sagittal and coronal reformations) when the CT findings are normal. MATERIALS AND METHODS: The study was HIPAA compliant and institutional review board approved. Informe ...
Diaphragm border detection in coronary X-ray - CVC
... when visually estimating myocardium healthiness. Additionally, several automatic or semi-automatic methods for myocardial perfusion estimation have been proposed in the last seven years and all of them are negatively affected by the diaphragm motion. The method in [1] use pre-processing to compensat ...
... when visually estimating myocardium healthiness. Additionally, several automatic or semi-automatic methods for myocardial perfusion estimation have been proposed in the last seven years and all of them are negatively affected by the diaphragm motion. The method in [1] use pre-processing to compensat ...
September - BIDMC Radiology Alumni
... for complex anatomy and problemsolving with medical students, residents and fellows while always validating their contributions and guiding the next step in their learning .... Her example and encouragement make her one of the most important mentors I've ever had, and I know that many radiology resi ...
... for complex anatomy and problemsolving with medical students, residents and fellows while always validating their contributions and guiding the next step in their learning .... Her example and encouragement make her one of the most important mentors I've ever had, and I know that many radiology resi ...
Classification of hypervascular liver lesions based on hepatic artery
... Perfusion CT of the liver typically involves scanning the liver at least 20 times, resulting in a large radiation dose. We developed and validated a simplified model of tumor blood supply that can be applied to standard triphasic scans, and evaluated whether this can be used to distinguish benig ...
... Perfusion CT of the liver typically involves scanning the liver at least 20 times, resulting in a large radiation dose. We developed and validated a simplified model of tumor blood supply that can be applied to standard triphasic scans, and evaluated whether this can be used to distinguish benig ...
RADIATION PROTECTION IN DIAGNOSTIC RADIOLOGY
... The FWHM of the point spread function of a pin, or the edge response function of an edge should not differ more than ± 20% from baseline. • Low contrast resolution Polystyrene pins of 0.35 cm diameter inserted in a uniform body water phantom should be visible in the image. ...
... The FWHM of the point spread function of a pin, or the edge response function of an edge should not differ more than ± 20% from baseline. • Low contrast resolution Polystyrene pins of 0.35 cm diameter inserted in a uniform body water phantom should be visible in the image. ...
Diagnostic X-Ray QA/QC
... of very low intensity. Its modern design as well as premium technology underline the meter‘s strong performance within its scope of work. The QUART survey meter features an unrivalled energy response to measure radiation rate and dose from x-ray, beta and gamma sources. The meter detects leakage and ...
... of very low intensity. Its modern design as well as premium technology underline the meter‘s strong performance within its scope of work. The QUART survey meter features an unrivalled energy response to measure radiation rate and dose from x-ray, beta and gamma sources. The meter detects leakage and ...
European Guidelines on DRLs for Paediatric Imaging
... Lithuania, Estonia, Portugal, Ireland, Spain, the Netherlands and Italy. In some countries, patient dose surveys and proposals for national paediatric DRLs have been made but the proposed values have not been confirmed or officially set by an authoritative body. Furthermore, no guidelines are availa ...
... Lithuania, Estonia, Portugal, Ireland, Spain, the Netherlands and Italy. In some countries, patient dose surveys and proposals for national paediatric DRLs have been made but the proposed values have not been confirmed or officially set by an authoritative body. Furthermore, no guidelines are availa ...
Troubleshooting Manual
... Check that Ceph LAT-switch senses LAT position - if not - there isn’t soft-tissue compensation in Ceph LAT image. Check that nasion potentiometer frequency (caecfrq) is detected by CPU Board ...
... Check that Ceph LAT-switch senses LAT position - if not - there isn’t soft-tissue compensation in Ceph LAT image. Check that nasion potentiometer frequency (caecfrq) is detected by CPU Board ...
Assessment of global left ventricular function and volumes with 320
... helical scanning technique with retrospective ECG gating. These systems covered the entire heart in multiple heartbeats, which involved a considerable risk of motion artifacts due to arrhythmias and breathing. With the recent introduction of 320-row MDCT, a cylindrical volumetric dataset covering th ...
... helical scanning technique with retrospective ECG gating. These systems covered the entire heart in multiple heartbeats, which involved a considerable risk of motion artifacts due to arrhythmias and breathing. With the recent introduction of 320-row MDCT, a cylindrical volumetric dataset covering th ...
Processes Petrolingualis of the Foramen Lacerum
... software may show the basal cerebral arteries and cervical segment of the internal carotid arteries together with the bone structures of the cranial base including the carotid canal. The internal carotid artery passes through two foramen during its course through the carotid foramen. One of them is ...
... software may show the basal cerebral arteries and cervical segment of the internal carotid arteries together with the bone structures of the cranial base including the carotid canal. The internal carotid artery passes through two foramen during its course through the carotid foramen. One of them is ...
Cross Sectional Imaging Nuclear Medicine
... Cross Sectional Imaging • No superimposition of structures • Excellent contrast resolution – can see the difference between 2 similar tissues • For CT – scan can be performed in one plane (usually transverse) and reformatted in the others (sag, dorsal) • CT – good for bone and soft tissue • MRI – b ...
... Cross Sectional Imaging • No superimposition of structures • Excellent contrast resolution – can see the difference between 2 similar tissues • For CT – scan can be performed in one plane (usually transverse) and reformatted in the others (sag, dorsal) • CT – good for bone and soft tissue • MRI – b ...
Single Slice CT Scanner Comparison Report
... Although there are only four scanners listed in table 1, the information contained in this report is also relevant for other scanner models. The GE HiSpeed ZX/i has the same imaging performance as the HiSpeed LX/i and FX/i scanners, but different tube and generator sizes. It also has a shorter minim ...
... Although there are only four scanners listed in table 1, the information contained in this report is also relevant for other scanner models. The GE HiSpeed ZX/i has the same imaging performance as the HiSpeed LX/i and FX/i scanners, but different tube and generator sizes. It also has a shorter minim ...
Abstract Id : IRIA -1090
... If only the small intra-renal lymphatics are compromised, the lesion may appear as a solid renal lesion or with slight diffuse kidney enlargement with no cystic space The diagnosis can be conformed with needle aspiration chylous fluid from the perinephric fluid collecition ...
... If only the small intra-renal lymphatics are compromised, the lesion may appear as a solid renal lesion or with slight diffuse kidney enlargement with no cystic space The diagnosis can be conformed with needle aspiration chylous fluid from the perinephric fluid collecition ...
Department of Radiology-Annual Executive Summary Report
... received. Most were in ultrasound but there were others as well. We produce most of these courses right in our department, which helps save costs – an important advantage, since CME in radiology has become highly competitive. We had a productive year in research as well. Despite an ever-increasing c ...
... received. Most were in ultrasound but there were others as well. We produce most of these courses right in our department, which helps save costs – an important advantage, since CME in radiology has become highly competitive. We had a productive year in research as well. Despite an ever-increasing c ...
CT Angiography of Peripheral Arterial Disease
... runoff vessels became possible with a single acquisition and a single intravenous contrast medium injection (6). With increasing availability of multiple– detector row CT scanners, peripheral CT angiography has gradually entered clinical practice (7–11), and as a result of the concomitant rapid evol ...
... runoff vessels became possible with a single acquisition and a single intravenous contrast medium injection (6). With increasing availability of multiple– detector row CT scanners, peripheral CT angiography has gradually entered clinical practice (7–11), and as a result of the concomitant rapid evol ...
Integrated PET/CT in the staging of nonsmall cell lung cancer: technical
... reducing CT radiation dose. A 50% reduction in tube current reduces radiation dose by half. Any decrease in tube current should be considered carefully, because such reduction causes an increase in image noise, which may affect the diagnostic outcome of the examination [24]. Therefore, a high-dose C ...
... reducing CT radiation dose. A 50% reduction in tube current reduces radiation dose by half. Any decrease in tube current should be considered carefully, because such reduction causes an increase in image noise, which may affect the diagnostic outcome of the examination [24]. Therefore, a high-dose C ...
Brendan Hill - School of Physics
... reductions could be achieved. Traditionally both thermoluminescent detectors (TLD) and radiographic film have been used for determination of SWDP [37,44]. In the case of TLD, SWDP can be determined by stacking the 1D dosimeters in the z-direction of the CT gantry to enable 2D measurement of the X-ra ...
... reductions could be achieved. Traditionally both thermoluminescent detectors (TLD) and radiographic film have been used for determination of SWDP [37,44]. In the case of TLD, SWDP can be determined by stacking the 1D dosimeters in the z-direction of the CT gantry to enable 2D measurement of the X-ra ...
Review of transmission scanning configurations in cardiac SPECT
... detection of the lesions. A variety of correction techniques based on different assumptions have been used to reduce the impact of attenuation. Several types of systems with different transmission hardware modifications and external sources have been developed for clinical implementation. Each syste ...
... detection of the lesions. A variety of correction techniques based on different assumptions have been used to reduce the impact of attenuation. Several types of systems with different transmission hardware modifications and external sources have been developed for clinical implementation. Each syste ...
Custom AFM for X-ray beamlines: in situ biological
... spring constant. This has limited the applications of the X-ray– AFM powerful combination to a very narrow range of experiments, preventing investigations in liquids on soft and biological materials where cantilevers with a stiffness inferior to 1 N m1 have to be employed, as well as Electrostatic ...
... spring constant. This has limited the applications of the X-ray– AFM powerful combination to a very narrow range of experiments, preventing investigations in liquids on soft and biological materials where cantilevers with a stiffness inferior to 1 N m1 have to be employed, as well as Electrostatic ...
Quality Assurance in Mammography: Artifact Analysis1
... density not caused by true attenuation differences) can occur and can create pseudolesions or mask true abnormalities. Many artifacts are readily identified, whereas others present a true diagnostic challenge. Factors that create artifacts may be related to the processor (eg, static, dirt or excessi ...
... density not caused by true attenuation differences) can occur and can create pseudolesions or mask true abnormalities. Many artifacts are readily identified, whereas others present a true diagnostic challenge. Factors that create artifacts may be related to the processor (eg, static, dirt or excessi ...
- University of Alberta
... 3. Are the incisor length measurements determined from panoramic radiographs accurate and reliable when maxillary and mandibular incisor angulations are modified in a custom made typodont? a. Under experimental conditions, Md incisors appear to respond as expected when compared to theoretical model ...
... 3. Are the incisor length measurements determined from panoramic radiographs accurate and reliable when maxillary and mandibular incisor angulations are modified in a custom made typodont? a. Under experimental conditions, Md incisors appear to respond as expected when compared to theoretical model ...