How to Appropriately Calculate Effective Dose for CT
... OBJECTIVE. The purpose of this study is to show how to calculate effective dose in CT using size-specific dose estimates and to correct the current method using dose-length product (DLP). MATERIALS AND METHODS. Data were analyzed from 352 chest and 241 abdominopelvic CT images. Size-specific dose es ...
... OBJECTIVE. The purpose of this study is to show how to calculate effective dose in CT using size-specific dose estimates and to correct the current method using dose-length product (DLP). MATERIALS AND METHODS. Data were analyzed from 352 chest and 241 abdominopelvic CT images. Size-specific dose es ...
x-Ray imaging
... elements existing on earth (e.g. radon). One chest film is 100 times less than the natural radiation received per year. To see a list of radiation amounts and its impact on the body, click on body effects. Review X-ray is electromagnetic radiation, with a spectrum far beyond ultraviolet light, with ...
... elements existing on earth (e.g. radon). One chest film is 100 times less than the natural radiation received per year. To see a list of radiation amounts and its impact on the body, click on body effects. Review X-ray is electromagnetic radiation, with a spectrum far beyond ultraviolet light, with ...
Full Text - RSNA Publications Online
... use of MR imaging in patients with prostate cancer. All patients gave informed consent before enrollment in the prospective National Institutes of Health study, which was approved by our institutional review board and was compliant with the Health Insurance Portability and Accountability Act. From J ...
... use of MR imaging in patients with prostate cancer. All patients gave informed consent before enrollment in the prospective National Institutes of Health study, which was approved by our institutional review board and was compliant with the Health Insurance Portability and Accountability Act. From J ...
Philips SPECT/CT Systems
... Astonish provides constant image quality with wide range of count statistics 5 Observers: A relative image quality (RIQ) score with respect to a standard image (64x64x64 matrix, clinical counts, FBP reconstruction) was assigned to each image by each observer (3: much better, 2: better, 1: slightly b ...
... Astonish provides constant image quality with wide range of count statistics 5 Observers: A relative image quality (RIQ) score with respect to a standard image (64x64x64 matrix, clinical counts, FBP reconstruction) was assigned to each image by each observer (3: much better, 2: better, 1: slightly b ...
ACR–ASNR–SCBT-MR Practice Parameter for the Performance of
... physiologic tests. Adherence to the following practice parameter will enhance the probability of detecting such abnormalities. Spine MRI has important attributes that make it valuable in assessing spinal disease. Alternative diagnostic imaging tests include radiography, computed tomography (CT), mye ...
... physiologic tests. Adherence to the following practice parameter will enhance the probability of detecting such abnormalities. Spine MRI has important attributes that make it valuable in assessing spinal disease. Alternative diagnostic imaging tests include radiography, computed tomography (CT), mye ...
ACR–ASNR–SCBT-MR Practice Parameter for the Performance of
... physiologic tests. Adherence to the following practice parameter will enhance the probability of detecting such abnormalities. Spine MRI has important attributes that make it valuable in assessing spinal disease. Alternative diagnostic imaging tests include radiography, computed tomography (CT), mye ...
... physiologic tests. Adherence to the following practice parameter will enhance the probability of detecting such abnormalities. Spine MRI has important attributes that make it valuable in assessing spinal disease. Alternative diagnostic imaging tests include radiography, computed tomography (CT), mye ...
Kit for the Preparation of Technetium Tc99m Sulfur Colloid Injection
... over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of ...
... over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of ...
The Correlation of Ultrasound and Magnetic Resonance Imaging in
... cystic adenomatoid malformation, as gestational week proceeds, the possibility of detecting in MRI decreases as signal intensity of lesions and the rate of lesion in growing lungs relatively decrease.5 It was observed that it became hard to distinguish from normal lung tissue in progressive gestatio ...
... cystic adenomatoid malformation, as gestational week proceeds, the possibility of detecting in MRI decreases as signal intensity of lesions and the rate of lesion in growing lungs relatively decrease.5 It was observed that it became hard to distinguish from normal lung tissue in progressive gestatio ...
ibk – a new tool for medical image processing
... Science & Technology Development, Vol 13, No.K5- 2010 similarity measure. Generally, these criteria can ...
... Science & Technology Development, Vol 13, No.K5- 2010 similarity measure. Generally, these criteria can ...
MRI evaluation of acute appendicitis in pregnancy
... diameter is equal to or less than 6 mm and/or it is filled with oral contrast material, air, or both (Fig. 1). Both air and oral contrast within the normal appendix are of low signal intensity on T1- and T2-weighted images and become more prominent on T2*-weighted images (TOF and T1-weighted GRE ima ...
... diameter is equal to or less than 6 mm and/or it is filled with oral contrast material, air, or both (Fig. 1). Both air and oral contrast within the normal appendix are of low signal intensity on T1- and T2-weighted images and become more prominent on T2*-weighted images (TOF and T1-weighted GRE ima ...
the new Lugano classification
... leading to the most recent Lugano classification (1). Staging is used to define the anatomic distribution of the disease for purposes of prognosis and treatment planning. The first such system in lymphoma was a three stage classification published by Peters in 1950 (2) and was followed by the Rye cl ...
... leading to the most recent Lugano classification (1). Staging is used to define the anatomic distribution of the disease for purposes of prognosis and treatment planning. The first such system in lymphoma was a three stage classification published by Peters in 1950 (2) and was followed by the Rye cl ...
- Wiley Online Library
... motion during the entire treatment course, whereas anatomical data provided by X-ray imaging enables the update of the external–internal correlation to reduce tumor position estimation uncertainties.(15,16) The accuracy of tumor tracking systems based on correlation models was quantified within 2.5 ...
... motion during the entire treatment course, whereas anatomical data provided by X-ray imaging enables the update of the external–internal correlation to reduce tumor position estimation uncertainties.(15,16) The accuracy of tumor tracking systems based on correlation models was quantified within 2.5 ...
AAPM Imaging Physics Curricula Subcommittee
... Although this curriculum was not developed specifically to prepare residents for the American Board of Radiology (ABR) examination, it is understood that this is one of the aims of this curriculum. The ABR certification in diagnostic radiology is divided into two examinations, the first covering bas ...
... Although this curriculum was not developed specifically to prepare residents for the American Board of Radiology (ABR) examination, it is understood that this is one of the aims of this curriculum. The ABR certification in diagnostic radiology is divided into two examinations, the first covering bas ...
Developmental Dysplasia of the Hip (DDH)
... whole pelvis, femoral head, neck, trochanters and proximal third of fourth of the shaft of femur should be included in the image. To provide accurate diagnostic image, most important thing is positioning the patient in true supine position to avoid pelvic rotation and both iliac crest should be symm ...
... whole pelvis, femoral head, neck, trochanters and proximal third of fourth of the shaft of femur should be included in the image. To provide accurate diagnostic image, most important thing is positioning the patient in true supine position to avoid pelvic rotation and both iliac crest should be symm ...
ACR practice guideline for the performance of magnetic resonance
... between tumor and surrounding tissue is important. When highresolution images are being obtained, chemical fat suppression is helpful as a method to reduce fat signal while preserving the signal-to-noise ratio. Subtraction is often used for low resolution, dynamic imaging. Sole reliance on subtracti ...
... between tumor and surrounding tissue is important. When highresolution images are being obtained, chemical fat suppression is helpful as a method to reduce fat signal while preserving the signal-to-noise ratio. Subtraction is often used for low resolution, dynamic imaging. Sole reliance on subtracti ...
ODO.46
... Evaluate the effect of any diagnosed TMD on the orthodontic treatment, and gauge the of referring a patient before or during any orthodontic treatment. ...
... Evaluate the effect of any diagnosed TMD on the orthodontic treatment, and gauge the of referring a patient before or during any orthodontic treatment. ...
Drugs Used as Interventional Agents in Nuclear Medicine
... AV block and bradycardia. The package insert also reports that fatal cardiac arrest and sustained ventricular tachycardia (requiring resuscitation) had been reported coincident with the infusion of adenosine, but it did not provide a pcrccnt incidence.’2 Clinidly it has been observed that the advers ...
... AV block and bradycardia. The package insert also reports that fatal cardiac arrest and sustained ventricular tachycardia (requiring resuscitation) had been reported coincident with the infusion of adenosine, but it did not provide a pcrccnt incidence.’2 Clinidly it has been observed that the advers ...
Principles of Computerized Tomographic Imaging
... Due to the use of multi-row detector array, projection data along a given path may be measured multiple times by different detector rows. One important consideration in multi-slice helical CT data acquisition is to select a preferred helical pitch to reduce the redundant measurements and therefore t ...
... Due to the use of multi-row detector array, projection data along a given path may be measured multiple times by different detector rows. One important consideration in multi-slice helical CT data acquisition is to select a preferred helical pitch to reduce the redundant measurements and therefore t ...
Radiological progression of cerebral metastases after radiosurgery: assessment of perfusion MRI
... recurrence. Patient B displays a perfusion absence (Fig. 1b, ‘‘black spot,’’ arrow), suggestive of necrosis, at the lesion site as indicated by the post-contrast scan. This was confirmed by clinical and radiological follow-up. For the last patient (C) the rCBV map was judged ‘‘inconclusive,’’ since ...
... recurrence. Patient B displays a perfusion absence (Fig. 1b, ‘‘black spot,’’ arrow), suggestive of necrosis, at the lesion site as indicated by the post-contrast scan. This was confirmed by clinical and radiological follow-up. For the last patient (C) the rCBV map was judged ‘‘inconclusive,’’ since ...
A New Approach for Motion Correction in SPECT - CEUR
... artefacts. These motion artefacts may significantly affect the diagnostic accuracy [2, 3, 4]. Different methods have been proposed for the correction of motion in SPECT studies. These methods may be divided into three categories. The first two approaches do produce motion corrected projections and t ...
... artefacts. These motion artefacts may significantly affect the diagnostic accuracy [2, 3, 4]. Different methods have been proposed for the correction of motion in SPECT studies. These methods may be divided into three categories. The first two approaches do produce motion corrected projections and t ...
Area Detector CT - Toshiba Medical Systems Europe
... and clinical confidence. We also focused on even further reduction of dose and refinement of image quality. To achieve this, we developed a completely unique, new model-based iterative reconstruction algorithm, called FIRST’.” “With its groundbreaking new technologies, like FIRST, the Aquilion GENES ...
... and clinical confidence. We also focused on even further reduction of dose and refinement of image quality. To achieve this, we developed a completely unique, new model-based iterative reconstruction algorithm, called FIRST’.” “With its groundbreaking new technologies, like FIRST, the Aquilion GENES ...
The Role of Nuclear Medicine in the Diagnosis and Management of
... and PET/CT and single photon emission computed tomography (SPECT) or SPECT/CT. The advantages of this approach are to avoid unnecessary invasive intervention for diagnosis and treatment of the benign SPN and to proceed to further invasive investigations such as percuta ...
... and PET/CT and single photon emission computed tomography (SPECT) or SPECT/CT. The advantages of this approach are to avoid unnecessary invasive intervention for diagnosis and treatment of the benign SPN and to proceed to further invasive investigations such as percuta ...
visualization techniques for 3d multimodal medical datasets: a survey
... Another volume rendering technique that uses 3D textures for rendering multimodal datasets has been introduced in (Abellán & Tost, 2008). A 3D texture is created for each pre-registered volume that will be used. GLSL shaders and 3D mapping techniques are used to achieve shading and fusion. The propo ...
... Another volume rendering technique that uses 3D textures for rendering multimodal datasets has been introduced in (Abellán & Tost, 2008). A 3D texture is created for each pre-registered volume that will be used. GLSL shaders and 3D mapping techniques are used to achieve shading and fusion. The propo ...
Segmentation of Thyroid Scintography Using Edge Detection and
... been developed integrating the CT technique with either SPECT or PET resulting in SPECT/CT and PET/CT respectively. This chapter will concentrate on the implementation of MatLab code in gamma camera planar imaging, SPECT and SPECT/CT methods [5-7]. The gamma camera is composed of a collimator, a sci ...
... been developed integrating the CT technique with either SPECT or PET resulting in SPECT/CT and PET/CT respectively. This chapter will concentrate on the implementation of MatLab code in gamma camera planar imaging, SPECT and SPECT/CT methods [5-7]. The gamma camera is composed of a collimator, a sci ...