Dental Radiographic Examinations
... guidelines in Table 1 are presented within a matrix of common clinical and patient factors, which may determine the type(s) of radiographs that is commonly needed. The guidelines assume that diagnostically adequate radiographs can be obtained. If not, appropriate management techniques should be used ...
... guidelines in Table 1 are presented within a matrix of common clinical and patient factors, which may determine the type(s) of radiographs that is commonly needed. The guidelines assume that diagnostically adequate radiographs can be obtained. If not, appropriate management techniques should be used ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... maxillofacial CBCT imaging to the assessment of osseous structures. Work continues to develop systems capable of a wide contrast range supporting both hard tissue and soft tissue applications while still limiting dose. CBCT images, like those from other diagnostic modalities,aresusceptibletoartifact ...
... maxillofacial CBCT imaging to the assessment of osseous structures. Work continues to develop systems capable of a wide contrast range supporting both hard tissue and soft tissue applications while still limiting dose. CBCT images, like those from other diagnostic modalities,aresusceptibletoartifact ...
Lateral - XinXii
... Ionizing radiation has harmful effects. The only modalities without ionizing radiation effects are MRI and ultrasound although the latter may have thermal effects on an un born child. These effects are Somatic and Genetic. ...
... Ionizing radiation has harmful effects. The only modalities without ionizing radiation effects are MRI and ultrasound although the latter may have thermal effects on an un born child. These effects are Somatic and Genetic. ...
X-ray Tube and Generator
... atoms). During the next process of film fixing the remaining un-sensitised grains (which had not been exposed to light photons) are removed and washed out. The final visible image contains areas with various opacity/darkness (depending on the concentration of Ag atoms). ...
... atoms). During the next process of film fixing the remaining un-sensitised grains (which had not been exposed to light photons) are removed and washed out. The final visible image contains areas with various opacity/darkness (depending on the concentration of Ag atoms). ...
Computed Tomography Radiation Safety Issues in Ontario
... Issue Computed tomography (CT) is a powerful tool for the accurate and effective diagnosis and treatment of a variety of conditions because it allows high-resolution threedimensional images to be acquired very quickly. Therefore, the use of CT has increased substantially over the past decade, result ...
... Issue Computed tomography (CT) is a powerful tool for the accurate and effective diagnosis and treatment of a variety of conditions because it allows high-resolution threedimensional images to be acquired very quickly. Therefore, the use of CT has increased substantially over the past decade, result ...
Garba_Idris_MASTERS
... local context is advised. These reference doses are a guide to the expected exposure dose from a procedure and are useful as an investigation tool to identify incidences where patient doses are unusually high. Methodology: The study was conducted in three radiology departments with CT centres in Nor ...
... local context is advised. These reference doses are a guide to the expected exposure dose from a procedure and are useful as an investigation tool to identify incidences where patient doses are unusually high. Methodology: The study was conducted in three radiology departments with CT centres in Nor ...
General Screen Film Radiography and Its Limitations
... General Screen Film Radiography and Its Limitations ...
... General Screen Film Radiography and Its Limitations ...
NDAC TITLE 114 ND MEDICAL IMAGING and RADIATION
... improvement of various core processes that ensures improved medical imaging and radiation therapy department performance. 30. “Patient" means an individual subjected to ionizing and non-ionizing radiation for the purposes of diagnosis or treatment. 31. “Primary source verification” means the process ...
... improvement of various core processes that ensures improved medical imaging and radiation therapy department performance. 30. “Patient" means an individual subjected to ionizing and non-ionizing radiation for the purposes of diagnosis or treatment. 31. “Primary source verification” means the process ...
18. Optimization of protection in CT - RPOP
... practice in 1972 and revolutionized X Ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are not superimposed on the image as they are in conventional projections • The CT provides improved low contrast resolution for better visualization o ...
... practice in 1972 and revolutionized X Ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are not superimposed on the image as they are in conventional projections • The CT provides improved low contrast resolution for better visualization o ...
Related Symposia in AAPM 2007 Functional and Physiological MR Imaging for Therapy Assessment
... Early Assessment for Tumor Response to CRT Several studies have shown that max CBV in highhigh-grade gliomas is associated with tumor grade, and is a prognostic factor of OS. Does reduction in high CBV in glioma during early treatment of CRT predict clinical outcomes? A decrease in the Pre RT Week 3 ...
... Early Assessment for Tumor Response to CRT Several studies have shown that max CBV in highhigh-grade gliomas is associated with tumor grade, and is a prognostic factor of OS. Does reduction in high CBV in glioma during early treatment of CRT predict clinical outcomes? A decrease in the Pre RT Week 3 ...
The World`s First Adaptive Scanner
... been patient safety and in Computed Tomography. This translates primarily into dose reduction. For this reason, Siemens has developed many significant products and protocols that follow – even shape and redefine – the “As Low as Reasonably Achievable” (ALARA) principle to reduce radiation dose to th ...
... been patient safety and in Computed Tomography. This translates primarily into dose reduction. For this reason, Siemens has developed many significant products and protocols that follow – even shape and redefine – the “As Low as Reasonably Achievable” (ALARA) principle to reduce radiation dose to th ...
Tomography
... measurements at a different angle. This process is repeated at 1-degree intervals over 180 degrees, resulting in the complete CT data set. ...
... measurements at a different angle. This process is repeated at 1-degree intervals over 180 degrees, resulting in the complete CT data set. ...
chest imaging
... The manifestations of late effects are wide ranging and involve all organ systems, with differential presentation largely dependent on both the primary malignancy and the treatment received. Some of the most common late effects observed in childhood cancer survivors are pulmonary and cardiac complic ...
... The manifestations of late effects are wide ranging and involve all organ systems, with differential presentation largely dependent on both the primary malignancy and the treatment received. Some of the most common late effects observed in childhood cancer survivors are pulmonary and cardiac complic ...
Skeletal Scintigraphy - Moffitt Cancer Center
... detector head(s) record the radiotracer-emission events. CT is obtained while the patient continues to remain still in the same position; the data are subsequently registered. The order in which SPECT or CT is acquired can be tailored to the specific scenario evaluated. Low-dose CT can be performed ...
... detector head(s) record the radiotracer-emission events. CT is obtained while the patient continues to remain still in the same position; the data are subsequently registered. The order in which SPECT or CT is acquired can be tailored to the specific scenario evaluated. Low-dose CT can be performed ...
The Interactions of X
... elements, say C, H, O or N that makes up soft tissues. • The inner shell electron can absorb ALL of this photon’s energy and the electron can be ejected. • Any excess energy (outside what it takes to unbind the electron) shows up as KE in the electron. ...
... elements, say C, H, O or N that makes up soft tissues. • The inner shell electron can absorb ALL of this photon’s energy and the electron can be ejected. • Any excess energy (outside what it takes to unbind the electron) shows up as KE in the electron. ...
Volume-of-interest cone-beam CT using a 2.35 MV beam generated
... Key words: low-Z target, carbon, volume-of-interest, region-of-interest, cone beam CT I. INTRODUCTION Over the past few years, several investigators have demonstrated the concept of using low atomic number (Z) linear accelerator targets to produce x-ray beams with energy characteristics suited to im ...
... Key words: low-Z target, carbon, volume-of-interest, region-of-interest, cone beam CT I. INTRODUCTION Over the past few years, several investigators have demonstrated the concept of using low atomic number (Z) linear accelerator targets to produce x-ray beams with energy characteristics suited to im ...
International Workshop on Monte Carlo Techniques in Medical
... artificial implants from CAD modeling (screws, hip replacements, brachytherapy seeds, etc) or anatomical details extracted from other imaging modalities, such as for example MRI (arteries, spinal cord, atheroma, etc). A potential solution based on the use of smaller voxels for modeling complex objec ...
... artificial implants from CAD modeling (screws, hip replacements, brachytherapy seeds, etc) or anatomical details extracted from other imaging modalities, such as for example MRI (arteries, spinal cord, atheroma, etc). A potential solution based on the use of smaller voxels for modeling complex objec ...
Diagnostic Reference Levels in Medical Imaging
... dependent on the individual clinical circumstances. A potential approach is to take into consideration not only the usual clinical and technical factors, but also the relative “complexity” of the procedure. More than one quantity (i.e. multiple diagnostic reference levels) may be needed to evaluate ...
... dependent on the individual clinical circumstances. A potential approach is to take into consideration not only the usual clinical and technical factors, but also the relative “complexity” of the procedure. More than one quantity (i.e. multiple diagnostic reference levels) may be needed to evaluate ...
Venous malformations
... and neck: current concepts in management. Br J Oral Maxillofac Surg. 2016. [Ahead of print]. • Nassiri N et al. Evaluation and management of peripheral venous and lymphatic malformations. 4 (2): 257-65, 2016. • Woolen S et al. Paragangliomas of the Head and Neck. Neuroimaging Clin N Am. 2016. [Ahead ...
... and neck: current concepts in management. Br J Oral Maxillofac Surg. 2016. [Ahead of print]. • Nassiri N et al. Evaluation and management of peripheral venous and lymphatic malformations. 4 (2): 257-65, 2016. • Woolen S et al. Paragangliomas of the Head and Neck. Neuroimaging Clin N Am. 2016. [Ahead ...
Adult Brain Tumors - Neuroimaging Clinics of North America
... tumor generally implies an origin outside the central nervous system (metastasis) (see Fig. 4), a highly malignant tumor that has destroyed all neurons in that location may also demonstrate absence of NAA (see Fig. 5).5 On the other hand, ...
... tumor generally implies an origin outside the central nervous system (metastasis) (see Fig. 4), a highly malignant tumor that has destroyed all neurons in that location may also demonstrate absence of NAA (see Fig. 5).5 On the other hand, ...
15 - Biblio UGent
... seventh decades. Pain is a prominent feature in both tumors. As these tumors are mostly solitary, multiplicity is always suggestive for metastasis from another site. Whereas cutaneous leiomyosarcomas metastasize in 10 % of the cases, or less, subcutaneous lesions metastasize in 30-40 % of cases. The ...
... seventh decades. Pain is a prominent feature in both tumors. As these tumors are mostly solitary, multiplicity is always suggestive for metastasis from another site. Whereas cutaneous leiomyosarcomas metastasize in 10 % of the cases, or less, subcutaneous lesions metastasize in 30-40 % of cases. The ...
Full Text
... Background: Percutaneous cryoablation is a minimally invasive alternative for surgical resection of a renal tumor. We report our experience with applying computed tomography-guided cryoablation in renal tumors, focusing on the technique, safety, and treatment response. Methods: We retrospectively re ...
... Background: Percutaneous cryoablation is a minimally invasive alternative for surgical resection of a renal tumor. We report our experience with applying computed tomography-guided cryoablation in renal tumors, focusing on the technique, safety, and treatment response. Methods: We retrospectively re ...
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... Effective dose for CT procedure varied within and across institutions with a mean 13-fold variation between highest and lowest dose for each study type Smith-Bindman, R, … Mahesh M, et al. Arch Intern Med 2009;169:2078-2086. ...
... Effective dose for CT procedure varied within and across institutions with a mean 13-fold variation between highest and lowest dose for each study type Smith-Bindman, R, … Mahesh M, et al. Arch Intern Med 2009;169:2078-2086. ...
Magnetic Resonance Spectroscopy
... evaluation of suspected brain tumors. Both assessments concluded the use of MRS should undergo further study (due to the limited nature of the evidence). In 2003, the BlueCross BlueShield Association Technology Evaluation Center (TEC) conducted an assessment of the published literature on MRS for th ...
... evaluation of suspected brain tumors. Both assessments concluded the use of MRS should undergo further study (due to the limited nature of the evidence). In 2003, the BlueCross BlueShield Association Technology Evaluation Center (TEC) conducted an assessment of the published literature on MRS for th ...