IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... staging patients with Dukes stage D lesions, which may lead to changes in surgical planning or preoperative management. Positive predictive value rates have been reported at 100 percent for CT staging of Dukes D lesions.(3) Frequently, however, CT may under stage patients with microinvasion of peric ...
... staging patients with Dukes stage D lesions, which may lead to changes in surgical planning or preoperative management. Positive predictive value rates have been reported at 100 percent for CT staging of Dukes D lesions.(3) Frequently, however, CT may under stage patients with microinvasion of peric ...
Perfusion-weighted magnetic resonance imaging in the evaluation
... demonstrates the degree of angiogenesis of lesions and is thus useful in the differentiation between neoplastic and infectious lesions, primary tumors and solitary metastases and in the post-treatment follow up to differentiate between tumoral recurrence and radionecrosis by identifying the presence ...
... demonstrates the degree of angiogenesis of lesions and is thus useful in the differentiation between neoplastic and infectious lesions, primary tumors and solitary metastases and in the post-treatment follow up to differentiate between tumoral recurrence and radionecrosis by identifying the presence ...
Prediction of respiratory tumour motion for real-time image
... Furthermore, the imaging dose given over long radiosurgery procedures or multiple radiotherapy fractions may not be insignificant, which means that we must reduce the sampling rate of the imaging system. This study evaluates various predictive models for reducing tumour localization errors when a re ...
... Furthermore, the imaging dose given over long radiosurgery procedures or multiple radiotherapy fractions may not be insignificant, which means that we must reduce the sampling rate of the imaging system. This study evaluates various predictive models for reducing tumour localization errors when a re ...
The importance of diffusion-weighted imaging (DWI) for delineating
... (ADC) maps in tumor delineation was evaluated.3 For tumors, the diffusion-weighted images and ADC maps of gliomas were less useful than the T2-weighted spin-echo and contrast-enhanced T1-weighted spin-echo images in definition of tumor boundaries.3 The high sensitivity and specificity of echo-planar ...
... (ADC) maps in tumor delineation was evaluated.3 For tumors, the diffusion-weighted images and ADC maps of gliomas were less useful than the T2-weighted spin-echo and contrast-enhanced T1-weighted spin-echo images in definition of tumor boundaries.3 The high sensitivity and specificity of echo-planar ...
Understanding Radiation Units
... Dose • In some procedures, patient skin doses approach those used in radiotherapy fractions • Maximum skin dose (MSD) or peak skin dose is the maximum dose received by a portion of the exposed skin. ...
... Dose • In some procedures, patient skin doses approach those used in radiotherapy fractions • Maximum skin dose (MSD) or peak skin dose is the maximum dose received by a portion of the exposed skin. ...
Medical physicist
... • Be a specialist by education, training, and experience in one or more fields of radiologic physics. The application for examination must be limited to the field(s) in which the candidate is a specialist. • Hold a bachelor’s degree in physics or applied physics from an approved institution. Other p ...
... • Be a specialist by education, training, and experience in one or more fields of radiologic physics. The application for examination must be limited to the field(s) in which the candidate is a specialist. • Hold a bachelor’s degree in physics or applied physics from an approved institution. Other p ...
CT1 - hullrad Radiation Physics
... altering the window width and level • Window width refers to the range of CT numbers selected for display • This range of CT numbers is centred at a particular level called the ...
... altering the window width and level • Window width refers to the range of CT numbers selected for display • This range of CT numbers is centred at a particular level called the ...
Feasibility Study of Dual Energy Radiographic Imaging for Target
... types or tissue-selection for generating high contrast images of targeted structures, which can be applied to improve tumor detection for diagnostic interpretation. Planar kilovoltage (kV) imaging plays an important role in image guidance in radiation therapy (RT) systems, such as CyberKnife (Accura ...
... types or tissue-selection for generating high contrast images of targeted structures, which can be applied to improve tumor detection for diagnostic interpretation. Planar kilovoltage (kV) imaging plays an important role in image guidance in radiation therapy (RT) systems, such as CyberKnife (Accura ...
Interventional Radiology 2013 - Angio CT Studies Update (PDF:1.60
... delivered to the tumor in both cases, but less blood reached the normal liver tissue surrounding it when the balloon was inflated. With this phenomenon, we have hypothesized that this could be explained by differences in tissue pressure within the liver. Normal liver is supplied by the hepatic arter ...
... delivered to the tumor in both cases, but less blood reached the normal liver tissue surrounding it when the balloon was inflated. With this phenomenon, we have hypothesized that this could be explained by differences in tissue pressure within the liver. Normal liver is supplied by the hepatic arter ...
Cavernous Malformations: A Literature Review and Case Study
... One of the most dangerous CMs is found in the brainstem. These CMs are considered infratentorial. The brainstem is the location of the brain that connects the cerebrum with the spinal cord. It includes the midbrain, medulla oblongata, and pons. These structures control many of the involuntary functi ...
... One of the most dangerous CMs is found in the brainstem. These CMs are considered infratentorial. The brainstem is the location of the brain that connects the cerebrum with the spinal cord. It includes the midbrain, medulla oblongata, and pons. These structures control many of the involuntary functi ...
Osteopenia – loss of bone mass (used more of a descriptive word)
... the middle first through a nutrient foramen. Next, the ends will get blood supply from the outside. (Before this direct blood supply the blood went through the phisis. Skeleton of the newborn contains primary ossification centers and non-ossified cartilage. FEMUR HEAD - there are 2 growth plates ...
... the middle first through a nutrient foramen. Next, the ends will get blood supply from the outside. (Before this direct blood supply the blood went through the phisis. Skeleton of the newborn contains primary ossification centers and non-ossified cartilage. FEMUR HEAD - there are 2 growth plates ...
Managing the imaging dose during Image-guided Radiotherapy Martin J Murphy PhD
... Managing the imaging dose during Image-guided Radiotherapy Martin J Murphy PhD Department of Radiation Oncology Virginia Commonwealth University ...
... Managing the imaging dose during Image-guided Radiotherapy Martin J Murphy PhD Department of Radiation Oncology Virginia Commonwealth University ...
- BIR Publications
... that information from at least 20 patients should be used. Set-up errors may range from 1.0–4.0 mm [14]. In this work, imaging data from the two sets of 25 patients were analysed, so giving 50 sets of 19 EPIs that were matched to the reference DRRs. Offsets in the left, right, superior, inferior, an ...
... that information from at least 20 patients should be used. Set-up errors may range from 1.0–4.0 mm [14]. In this work, imaging data from the two sets of 25 patients were analysed, so giving 50 sets of 19 EPIs that were matched to the reference DRRs. Offsets in the left, right, superior, inferior, an ...
Document
... 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 data and the standard reference values of various machines were obtained from service manual as part of QC/QA a ...
... 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 data and the standard reference values of various machines were obtained from service manual as part of QC/QA a ...
Photo-acoustic Imaging to Detect Tumors
... Fig.8 PAI of tumors using endogenous contrast (a) Overlaid maximum amplitude projections of PA images at 764 nm and 584 nm showing a tumor and its surrounding vasculature, respectively. The image clearly shows the vessel branching and structure around the tumor. (b) Images of the breast of a 57-yea ...
... Fig.8 PAI of tumors using endogenous contrast (a) Overlaid maximum amplitude projections of PA images at 764 nm and 584 nm showing a tumor and its surrounding vasculature, respectively. The image clearly shows the vessel branching and structure around the tumor. (b) Images of the breast of a 57-yea ...
Does Extent of Resection of a Glioblastoma Matter?
... routine use of image-guided navigation techniques, use of novel intraoperative tumor visualization modalities, and use of intraoperative functional monitoring when indicated by tumor location permit neurosurgeons to remove enhancing tumor more completely while maintaining excellent outcomes in terms ...
... routine use of image-guided navigation techniques, use of novel intraoperative tumor visualization modalities, and use of intraoperative functional monitoring when indicated by tumor location permit neurosurgeons to remove enhancing tumor more completely while maintaining excellent outcomes in terms ...
Panoramic Dental X-ray
... tissues, such as the muscles. It is generally used as an initial evaluation of the bones and teeth. Because your mouth is curved, the panoramic x-ray can sometimes create a slightly blurry image where accurate measurements of your teeth and jaw are not possible. If your dentist or surgeon needs more ...
... tissues, such as the muscles. It is generally used as an initial evaluation of the bones and teeth. Because your mouth is curved, the panoramic x-ray can sometimes create a slightly blurry image where accurate measurements of your teeth and jaw are not possible. If your dentist or surgeon needs more ...
Fluid-attenuated inversion- recovery MR sequence in the - CEON-a
... FLAIR has shown either equal or better sensitivity in detecting and followup of residual and recurrent tumors, especially low-grade astrocytoma (8). Follow-up of tumor margins is especially important in early detection of postoperative relapses. It also defines the postoperative cavity and shows the ...
... FLAIR has shown either equal or better sensitivity in detecting and followup of residual and recurrent tumors, especially low-grade astrocytoma (8). Follow-up of tumor margins is especially important in early detection of postoperative relapses. It also defines the postoperative cavity and shows the ...
organ and effective doses from a multidetector computed
... objective of this study is to calculate the organ and effective doses from patient data. The beam data was collected for 30 cases of patient over 20 years old underwent 64 slices GE VCT MDCT scanner in the chest examinations. The computed tomography dose index (CTDI) values were measured in air and ...
... objective of this study is to calculate the organ and effective doses from patient data. The beam data was collected for 30 cases of patient over 20 years old underwent 64 slices GE VCT MDCT scanner in the chest examinations. The computed tomography dose index (CTDI) values were measured in air and ...
Shielding of Medical Facilities. Shielding Desing Considerations for
... Modern PET scanners are very expensive sophisticated equipment. They are also much easier to install and to operate, with many new capabilities. PETs are so expensive that there are only about 150 installations around the world, which are mainly concentrated in USA, Europe and Japan. In the Southern ...
... Modern PET scanners are very expensive sophisticated equipment. They are also much easier to install and to operate, with many new capabilities. PETs are so expensive that there are only about 150 installations around the world, which are mainly concentrated in USA, Europe and Japan. In the Southern ...
technical Aspects of a Videofluoroscopic Swallowing Study Aspects
... materials such as metal will typically appear as darker objects. Barium impregnated fluids or foods are used so that the clinician can track the movement of stimuli from the oral cavity to the upper esophagus. Caution must be used when choosing both the test fluid and the barium product. The additio ...
... materials such as metal will typically appear as darker objects. Barium impregnated fluids or foods are used so that the clinician can track the movement of stimuli from the oral cavity to the upper esophagus. Caution must be used when choosing both the test fluid and the barium product. The additio ...
1 Introduction to medical imaging
... structures may be enhanced by the use of various contrast materials, also known as contrast media. The most common contrast materials are based on barium or iodine. Barium and iodine are high atomic number materials that strongly absorb X-rays and are therefore seen as dense white on radiography. Fo ...
... structures may be enhanced by the use of various contrast materials, also known as contrast media. The most common contrast materials are based on barium or iodine. Barium and iodine are high atomic number materials that strongly absorb X-rays and are therefore seen as dense white on radiography. Fo ...
Good Afternoon I am Bulent Aydogan and I will be Good Afternoon I
... radium loading system designed to deliver a homogeneous dose distribution to a defined zone of tissue, known as the paracervical triangle.3 The point of limiting dose tolerance within the paracervical triangle was designated as point A, defined as 2 cm lateral to the central uterine canal and 2 cm f ...
... radium loading system designed to deliver a homogeneous dose distribution to a defined zone of tissue, known as the paracervical triangle.3 The point of limiting dose tolerance within the paracervical triangle was designated as point A, defined as 2 cm lateral to the central uterine canal and 2 cm f ...
Radiation Safety Guide for Diagnostic Imaging X
... professional judgment of the physician. Sensitive body organs such as the gonads and the lens of the eye should be shielded with at least 0.5 mm and 0.2 mm lead equivalent respectively if these organs are in the primary beam, provided such shielding does not eliminate useful diagnostic information o ...
... professional judgment of the physician. Sensitive body organs such as the gonads and the lens of the eye should be shielded with at least 0.5 mm and 0.2 mm lead equivalent respectively if these organs are in the primary beam, provided such shielding does not eliminate useful diagnostic information o ...