CT chest and gantry rotation time
... Ongoing research has shown that increasing detector width and rotation speed not only make CT imaging faster, but also improves workflow, making this ...
... Ongoing research has shown that increasing detector width and rotation speed not only make CT imaging faster, but also improves workflow, making this ...
Medical Imaging and Anatomy - Course Manual and Syllabus
... interaction with medical imaging and those professionals who provide imaging during your future training. Each student will also participate in selective reading room experiences, dissection demonstrations and oral presentations that are based on their future career directions. The use of radiology ...
... interaction with medical imaging and those professionals who provide imaging during your future training. Each student will also participate in selective reading room experiences, dissection demonstrations and oral presentations that are based on their future career directions. The use of radiology ...
Novation Diagnostic Imaging Watch Product and
... Information Survey adopted by CMS in 2010, radiation therapy centers will see an overall reimbursement decrease of 9 percent and radiation oncology providers will see a 7 percent decrease, according to AuntMinnie. com associate editor, Kate Yee. CMS will also expand the multiple procedure payment re ...
... Information Survey adopted by CMS in 2010, radiation therapy centers will see an overall reimbursement decrease of 9 percent and radiation oncology providers will see a 7 percent decrease, according to AuntMinnie. com associate editor, Kate Yee. CMS will also expand the multiple procedure payment re ...
SOMATOM Emotion
... 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 ...
aS1000 - Medical Physics International Journal
... tests included is MTF, which is used for determining high contrast resolution of the imager. However, since we are using a detector with an already known pixel resolution of 0.39 mm, the MTF evaluation may not be significantly needed. The QC analysis with the use of epidSoft software is not automate ...
... tests included is MTF, which is used for determining high contrast resolution of the imager. However, since we are using a detector with an already known pixel resolution of 0.39 mm, the MTF evaluation may not be significantly needed. The QC analysis with the use of epidSoft software is not automate ...
A quality assurance phantom for electronic portal
... EPID has become an essential component in high-precision radiation therapy providing digital images that can be enhanced to aid visualization and interpretation. Image verification is subject to accuracy of the data acquired and, to some extent, on the post-processing algorithms. Modern radiation th ...
... EPID has become an essential component in high-precision radiation therapy providing digital images that can be enhanced to aid visualization and interpretation. Image verification is subject to accuracy of the data acquired and, to some extent, on the post-processing algorithms. Modern radiation th ...
Walter et al. (2007) Radiotherapy and Oncology 85
... A more detailed view of the bony structure and soft tissue can be achieved by using photons of lower energy, for example with an X-ray source inside the treatment room emitting photons with a maximum energy of 80–140 keV. While these devices provide images of the bony anatomy with better quality tha ...
... A more detailed view of the bony structure and soft tissue can be achieved by using photons of lower energy, for example with an X-ray source inside the treatment room emitting photons with a maximum energy of 80–140 keV. While these devices provide images of the bony anatomy with better quality tha ...
Case 11495 Duplication of the inferior vena cava in oncologic
... congenital mesocaval shunt and azygos continuation of the IVC in a 10-month-old infant with polysplenia and dextrocardia. During the development of cross sectional imaging, congenital anomalies of the IVC and its tributaries have become more frequently encountered [2]. Vascular structures can be dif ...
... congenital mesocaval shunt and azygos continuation of the IVC in a 10-month-old infant with polysplenia and dextrocardia. During the development of cross sectional imaging, congenital anomalies of the IVC and its tributaries have become more frequently encountered [2]. Vascular structures can be dif ...
Image artifact in dental cone
... limited-volume CBCT imaging study of a dried mandible using a charge-coupled device (CCD) x-ray detector, a ‘‘bright band artifact’’ was observed in the edges of imaging area. They mentioned that this bright band artifact was caused by the placement of radiopaque objects outside of the reconstructed ...
... limited-volume CBCT imaging study of a dried mandible using a charge-coupled device (CCD) x-ray detector, a ‘‘bright band artifact’’ was observed in the edges of imaging area. They mentioned that this bright band artifact was caused by the placement of radiopaque objects outside of the reconstructed ...
Current Trends in the Imaging of Diffuse Axonal Injury
... improve 18 months postinjury but do not normalize to right-sided values Key: ...
... improve 18 months postinjury but do not normalize to right-sided values Key: ...
DRL Reference Guide - NC Radiation Protection
... Kerma (ESAK) in radiography, Entrance Air Kerma Rate in fluoroscopy, and CT Dose Index (CTDIvol) in CT can be used as metric in a quality control program to identify possible situations where certain protocols, equipment, or procedures may be producing unnecessarily high radiation doses to patients. ...
... Kerma (ESAK) in radiography, Entrance Air Kerma Rate in fluoroscopy, and CT Dose Index (CTDIvol) in CT can be used as metric in a quality control program to identify possible situations where certain protocols, equipment, or procedures may be producing unnecessarily high radiation doses to patients. ...
Liver Lesion (Incidental) - Diagnostic Imaging Pathways
... (FNH) lesions can be distinguish from hepatic adenoma with the use of CEUS, an alternative to CEMRI which is often restricted by limited availability despite being the investigation of choice Advantages of CEUS 6 Ability to assess the contrast enhancement patterns in real time Higher temporal resolu ...
... (FNH) lesions can be distinguish from hepatic adenoma with the use of CEUS, an alternative to CEMRI which is often restricted by limited availability despite being the investigation of choice Advantages of CEUS 6 Ability to assess the contrast enhancement patterns in real time Higher temporal resolu ...
Scatter Compensation Techniques in PET
... that are scattered through a given angle actually have a distribution of energies sharply peaked about the value calculated by the simple formula [6]. Although this effect, which is called ‘‘Doppler broadening,’’ has some importance for Compton cameras [7], its impact in PET is limited because the e ...
... that are scattered through a given angle actually have a distribution of energies sharply peaked about the value calculated by the simple formula [6]. Although this effect, which is called ‘‘Doppler broadening,’’ has some importance for Compton cameras [7], its impact in PET is limited because the e ...
Diagnostic Reference Levels (DRL)
... Diagnostic Reference Level (DRL) is a dose metric for an average size patient or a phantom. CT Dose Index (CTDIvol) in CT can be used as a metric in a quality control program to identify possible situations where protocols, equipment, or procedures may be produce high radiation doses to patients. Th ...
... Diagnostic Reference Level (DRL) is a dose metric for an average size patient or a phantom. CT Dose Index (CTDIvol) in CT can be used as a metric in a quality control program to identify possible situations where protocols, equipment, or procedures may be produce high radiation doses to patients. Th ...
Document
... The study is based on estimate of CTDI and DLP values for patients’ dose optimization procedures. Technical parameters were obtained for three groups of randomly selected patients undergoing abdominal CT examinations of 1320 patients of age 20-80 years. The measured values were obtained on image dat ...
... The study is based on estimate of CTDI and DLP values for patients’ dose optimization procedures. Technical parameters were obtained for three groups of randomly selected patients undergoing abdominal CT examinations of 1320 patients of age 20-80 years. The measured values were obtained on image dat ...
ACR–SPR–STR Practice Parameter for the Performance of Pulmonary
... This document is an educational tool designed to assist practitioners in providing appropriate radiologic care 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 o ...
... This document is an educational tool designed to assist practitioners in providing appropriate radiologic care 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 o ...
The Image Gently in Dentistry Campaign
... and group purchasers of health care.” Standards and expectations ...
... and group purchasers of health care.” Standards and expectations ...
GE Healthcare Discovery* CT750 HD Great care by design
... images and depict how the object would look if the X-ray source produced only photons at a single energy. ...
... images and depict how the object would look if the X-ray source produced only photons at a single energy. ...
Fat and Water Separation in Balanced Steady
... by using frequency-selective RF pulses in every TR, similarly to the conventional approach used in spin-echo imaging (5). This method increases TRs that are ordinarily short in generic SSFP sequences, and thus increases total scan time by a noticeable factor. Alternatively, magnetization preparation ...
... by using frequency-selective RF pulses in every TR, similarly to the conventional approach used in spin-echo imaging (5). This method increases TRs that are ordinarily short in generic SSFP sequences, and thus increases total scan time by a noticeable factor. Alternatively, magnetization preparation ...
People Exposed To More Radiation From Medical
... There are also two issues that increase the number of CT scans. One is demand by the patient that the procedure be performed and the other is the ordering of exams that are not necessary. Again, you (the patient) are strongly encouraged to work collaboratively with your physician when it comes to yo ...
... There are also two issues that increase the number of CT scans. One is demand by the patient that the procedure be performed and the other is the ordering of exams that are not necessary. Again, you (the patient) are strongly encouraged to work collaboratively with your physician when it comes to yo ...
Analog and Digital Systems of Imaging in
... Fig. 1. Scheme of cross-section through x-ray film X-ray film is made of a thin, transparent, flexible polyester film (base material of x-ray) and a thin layer of photographic emulsion (Fig. 1). The emulsion is coated with protective polymer layers and with a dulling agent. The photosensitive elemen ...
... Fig. 1. Scheme of cross-section through x-ray film X-ray film is made of a thin, transparent, flexible polyester film (base material of x-ray) and a thin layer of photographic emulsion (Fig. 1). The emulsion is coated with protective polymer layers and with a dulling agent. The photosensitive elemen ...
Do Community Hospitals Need Dual-Energy CT?
... Because the scan data are taken from different energy spectra, DECT can distinguish between materials of different atomic number. Although the limited adoption and availability of dual-energy CT have restricted clinical experience, peer-reviewed publications indicate increased confidence in specific ...
... Because the scan data are taken from different energy spectra, DECT can distinguish between materials of different atomic number. Although the limited adoption and availability of dual-energy CT have restricted clinical experience, peer-reviewed publications indicate increased confidence in specific ...
Isotropic Reconstruction of SPECT Data Using OSEM3D
... Rationale and Objectives. A statistical based iterative single-photon emission-computed tomography (SPECT) reconstruction algorithm (OSEM) modeling the depth-dependent collimator response in three dimensions has recently been introduced (OSEM3D). The aim of this study was to evaluate the axial shape ...
... Rationale and Objectives. A statistical based iterative single-photon emission-computed tomography (SPECT) reconstruction algorithm (OSEM) modeling the depth-dependent collimator response in three dimensions has recently been introduced (OSEM3D). The aim of this study was to evaluate the axial shape ...
Health Technology Assessment of Positron Emission Tomography
... clinical use of PET only, not basic research using PET. What is Positron Emission Tomography? PET is an innovative technology that has been in use since the 1970s. In contrast to Computed Tomography or Magnetic Resonance Imaging which both provide images based upon anatomy, PET creates images that r ...
... clinical use of PET only, not basic research using PET. What is Positron Emission Tomography? PET is an innovative technology that has been in use since the 1970s. In contrast to Computed Tomography or Magnetic Resonance Imaging which both provide images based upon anatomy, PET creates images that r ...
high-resolution imaging in nontransparent tissue
... An example is the early diagnosis of cancers. Many malignancies, such as uterine and esophageal cancers, are screened for in high risk patients, but are difficult to detect at curable stages. A high false negative rate means that the diagnosis was missed, even though the physician was looking for it ...
... An example is the early diagnosis of cancers. Many malignancies, such as uterine and esophageal cancers, are screened for in high risk patients, but are difficult to detect at curable stages. A high false negative rate means that the diagnosis was missed, even though the physician was looking for it ...
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.