19 Imaging Features of Hepatic Metastases: CT and MR
... primary tumor for oncologic reasons. In these patients, chemotherapy may be sought. On the other hand colorectal cancer is the prototype of malignant disease, in which the presence of limited metastatic disease does not preclude surgery. Exact knowledge of number, localization and size of metastases ...
... primary tumor for oncologic reasons. In these patients, chemotherapy may be sought. On the other hand colorectal cancer is the prototype of malignant disease, in which the presence of limited metastatic disease does not preclude surgery. Exact knowledge of number, localization and size of metastases ...
Evaluation of absorbed dose and image quality in mammography
... Mammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduc ...
... Mammography refers to the X-ray examination of the human breast, and is considered the single most important diagnostic tool in the early detection of breast cancer, which is by far the most common cancer among women. There is good evidence from clinical trials, that mammographic screening can reduc ...
Structure of the Atom - The American Association of Physicists in
... X-ray Production Q4. A direct result from adding additional filters to a diagnostic X-ray beam is that: A. the characteristic radiation is removed B. the image contrast is improved C. the maximum photon energy is increased D. the X-ray tube heat loading is reduced E. the patient dose is reduced AAP ...
... X-ray Production Q4. A direct result from adding additional filters to a diagnostic X-ray beam is that: A. the characteristic radiation is removed B. the image contrast is improved C. the maximum photon energy is increased D. the X-ray tube heat loading is reduced E. the patient dose is reduced AAP ...
PDF - Medical Journal of Australia
... patients with cancer. The availability of anatomical information from PET/CT can assist in selecting the most accessible mass for biopsy. After treatment, residual masses may not contain any active tumour, and the presence of residual uptake can guide which masses require biopsy. In addition, tissue ...
... patients with cancer. The availability of anatomical information from PET/CT can assist in selecting the most accessible mass for biopsy. After treatment, residual masses may not contain any active tumour, and the presence of residual uptake can guide which masses require biopsy. In addition, tissue ...
Imaging of Abnormal Placental Implantation: A Patient with Placenta Percreta
... orientation of the images are not apparent. Now that we have learned an approach to obstetrical ultrasound evaluation, let’s practice on Companion Patient 1 who has normal pelvic anatomy during pregnancy. ...
... orientation of the images are not apparent. Now that we have learned an approach to obstetrical ultrasound evaluation, let’s practice on Companion Patient 1 who has normal pelvic anatomy during pregnancy. ...
Thyroid Gland Tumor Diagnosis at US Elastography
... Diagnosis at US Elastography1 PURPOSE: To prospectively evaluate the elastographic appearance of thyroid gland tumors and explore the potential sensitivity and specificity of ultrasonographic (US) elastography for differentiating benign and malignant tumors, with histopathologic analysis as the refe ...
... Diagnosis at US Elastography1 PURPOSE: To prospectively evaluate the elastographic appearance of thyroid gland tumors and explore the potential sensitivity and specificity of ultrasonographic (US) elastography for differentiating benign and malignant tumors, with histopathologic analysis as the refe ...
Radiation Dose and Image Quality in Computed
... DECLARATION .........................................................................................................ii ABSTRACT ............................................................................................................... iii ...
... DECLARATION .........................................................................................................ii ABSTRACT ............................................................................................................... iii ...
Criteria for Acceptability of Medical Radiological Equipment used in
... This report provides a compendium of criteria which radiological, nuclear medicine and radiotherapy equipment in normal use ought to be able to pass. The most common form of criterion is a “suspension level” for a measurement of a performance or safety parameter. Failure to meet a suspension level w ...
... This report provides a compendium of criteria which radiological, nuclear medicine and radiotherapy equipment in normal use ought to be able to pass. The most common form of criterion is a “suspension level” for a measurement of a performance or safety parameter. Failure to meet a suspension level w ...
Clinical Training of Medical Physicists Specializing in Diagnostic
... technical aspects of this work is undertaken by the medical physicist. To ensure good practice in this vital area, structured clinical training programmes are required to complement academic learning. This publication is intended to be a guide to the practical implementation of such a programme for ...
... technical aspects of this work is undertaken by the medical physicist. To ensure good practice in this vital area, structured clinical training programmes are required to complement academic learning. This publication is intended to be a guide to the practical implementation of such a programme for ...
Cone beam computed tomography functionalities in dentistry
... provides a 3D representation from hard tissues along with little information from soft tissues.[6] Common CT systems have similar advantages (in addition to providing information on soft tissues), however, they create the image call with higher levels of ionic radiation and longer scanning time. In ...
... provides a 3D representation from hard tissues along with little information from soft tissues.[6] Common CT systems have similar advantages (in addition to providing information on soft tissues), however, they create the image call with higher levels of ionic radiation and longer scanning time. In ...
4D Target definition for SBRT
... miss – motion management • require skill and training • SABR may involve delivering small fields, specialized collimators, especially high dose rate beam – careful commissioning ...
... miss – motion management • require skill and training • SABR may involve delivering small fields, specialized collimators, especially high dose rate beam – careful commissioning ...
Computed Tomography - Florida Administrative Code
... research purposes. A computed tomography technologist performs computed tomography procedures and related techniques, producing sectional and three-dimensional images at the request of and for interpretation by a licensed independent practitioner; assists with interventional and therapeutic procedur ...
... research purposes. A computed tomography technologist performs computed tomography procedures and related techniques, producing sectional and three-dimensional images at the request of and for interpretation by a licensed independent practitioner; assists with interventional and therapeutic procedur ...
Calculation, verification and monitoring of patient dose in Diagnostic
... Routine Coronary Angiography is a relatively high dose diagnostic procedure. The results from a diagnostic procedure may indicate the need for an interventional examination, which has the potential for even higher patient dose. Doses for these procedures are monitored via an integrated dose area pro ...
... Routine Coronary Angiography is a relatively high dose diagnostic procedure. The results from a diagnostic procedure may indicate the need for an interventional examination, which has the potential for even higher patient dose. Doses for these procedures are monitored via an integrated dose area pro ...
Dense Breast Notification: Anatomy, Imaging, and Patient Awareness
... in Texas because her mammograms proved to be less than sufficient. She was diagnosed with breast cancer only after feeling a lump and demanding that additional testing be performed. Her 4-cm mass was discovered not with mammography, which showed no sign of a tumor, but with ultrasonography. The dela ...
... in Texas because her mammograms proved to be less than sufficient. She was diagnosed with breast cancer only after feeling a lump and demanding that additional testing be performed. Her 4-cm mass was discovered not with mammography, which showed no sign of a tumor, but with ultrasonography. The dela ...
19. Optimization of protection in mammography - RPOP
... in the image • Receptor blur: (screen-film combination) can be as small as 0.1 - 0.15 mm (full width at half maximum of the point response function) with a limiting value as high as 20 cycles per mm • Geometric unsharpness: focal spot size and imaging geometry must be chosen so that the overall unsh ...
... in the image • Receptor blur: (screen-film combination) can be as small as 0.1 - 0.15 mm (full width at half maximum of the point response function) with a limiting value as high as 20 cycles per mm • Geometric unsharpness: focal spot size and imaging geometry must be chosen so that the overall unsh ...
RADIATION PROTECTION IN DIAGNOSTIC RADIOLOGY
... in the image • Receptor blur: (screen-film combination) can be as small as 0.1 - 0.15 mm (full width at half maximum of the point response function) with a limiting value as high as 20 cycles per mm • Geometric unsharpness: focal spot size and imaging geometry must be chosen so that the overall unsh ...
... in the image • Receptor blur: (screen-film combination) can be as small as 0.1 - 0.15 mm (full width at half maximum of the point response function) with a limiting value as high as 20 cycles per mm • Geometric unsharpness: focal spot size and imaging geometry must be chosen so that the overall unsh ...
MR-guided liver biopsy within a short, wide
... 3–14 months, mean 5 months). In three cases the benign biopsy diagnosis was confirmed with clinical and radiological follow-up (6–20 months). In one patient with hepatitis C cirrhosis and suspected hepatocellular carcinoma (HCC), the biopsy result of unspecific septal fibrosis was rated as false-neg ...
... 3–14 months, mean 5 months). In three cases the benign biopsy diagnosis was confirmed with clinical and radiological follow-up (6–20 months). In one patient with hepatitis C cirrhosis and suspected hepatocellular carcinoma (HCC), the biopsy result of unspecific septal fibrosis was rated as false-neg ...
An X-ray Source Model and Characterization Method for Computing
... Radiation therapy has undergone many innovations since its inception. Modern techniques, such as three-dimensional conformal therapy (3DCRT), intensity-modulated radiation therapy (IMRT), and volumetric modulated arc therapy (VMAT), allow radiation treatment plans to conform more closely to the phys ...
... Radiation therapy has undergone many innovations since its inception. Modern techniques, such as three-dimensional conformal therapy (3DCRT), intensity-modulated radiation therapy (IMRT), and volumetric modulated arc therapy (VMAT), allow radiation treatment plans to conform more closely to the phys ...
Cone beam computed tomography and other imaging techniques in
... Tuned aperture computed tomography (TACT) TACT represents yet another form of radiographic imaging and is essentially a three-dimensional imageforming algorithm that can be used with any type of digital imaging system (46). It produces 3D data from several regular radiographs of a given area. Unlike ...
... Tuned aperture computed tomography (TACT) TACT represents yet another form of radiographic imaging and is essentially a three-dimensional imageforming algorithm that can be used with any type of digital imaging system (46). It produces 3D data from several regular radiographs of a given area. Unlike ...
Optimal parameters for clinical implementation of breast cancer
... high-density structures (ribs or hardware), and scatter from the patient’s body that creates too much noise for visualization of the clips. Similar findings were reported by Thomas et al.(3) In addition, our clinical experience has shown that rotations and translations can be difficult to distinguis ...
... high-density structures (ribs or hardware), and scatter from the patient’s body that creates too much noise for visualization of the clips. Similar findings were reported by Thomas et al.(3) In addition, our clinical experience has shown that rotations and translations can be difficult to distinguis ...
ACR Practice Parameter For The Performance Of Ultrasound
... Ultrasound-guided percutaneous breast interventional procedures should be performed by physicians who meet qualifications outlined in the ACR Practice Parameter for the Performance of a Breast Ultrasound Examination [4]. When the procedure is being performed for therapeutic reasons only (abscess dra ...
... Ultrasound-guided percutaneous breast interventional procedures should be performed by physicians who meet qualifications outlined in the ACR Practice Parameter for the Performance of a Breast Ultrasound Examination [4]. When the procedure is being performed for therapeutic reasons only (abscess dra ...
Management of Sialorrhea in Children with Cerebral
... patients with Parkinson’s disease (PD) [33]. Since then, several case series and unblinded, open-label cohort studies have reported its effect on drooling in children with CP and other neurological disorders [34–37]. The injected salivary glands were the parotid gland alone in one study [34], the su ...
... patients with Parkinson’s disease (PD) [33]. Since then, several case series and unblinded, open-label cohort studies have reported its effect on drooling in children with CP and other neurological disorders [34–37]. The injected salivary glands were the parotid gland alone in one study [34], the su ...