Essentials of Bone Densitometry for the Medical Physicist
... characterized by low bone mass and micro-architectural deterioration of bone tissue with a consequent increase in bone fragility and susceptibility to fracture. Osteoporosis is a major national health problem which affects an estimated 25 million men and women. Since women have lower bone mass than ...
... characterized by low bone mass and micro-architectural deterioration of bone tissue with a consequent increase in bone fragility and susceptibility to fracture. Osteoporosis is a major national health problem which affects an estimated 25 million men and women. Since women have lower bone mass than ...
1 - American College of Radiology
... Techniques for registration and fusion of images obtained from separate PET and CT scanners have been available for years. Combined PET/CT devices [1,2] provide both the metabolic information from FDG-PET and the anatomic information from CT in a single examination. The information obtained by PET/C ...
... Techniques for registration and fusion of images obtained from separate PET and CT scanners have been available for years. Combined PET/CT devices [1,2] provide both the metabolic information from FDG-PET and the anatomic information from CT in a single examination. The information obtained by PET/C ...
Quantitative studies using positron emission tomography for the
... accuracy in staging, differential diagnosis and therapy monitoring. Most PET studies are performed as a whole body scan. In selected cases a semiquantitative analysis is performed, which is based on the calculation of standardized uptake values (SUV). The present studies were undertaken in order to ...
... accuracy in staging, differential diagnosis and therapy monitoring. Most PET studies are performed as a whole body scan. In selected cases a semiquantitative analysis is performed, which is based on the calculation of standardized uptake values (SUV). The present studies were undertaken in order to ...
PDF - Journal of Advanced Medical and Dental Sciences
... wounds. CBCT is used widely for planning orthognathic and facial orthomorphic surgeries, where detailed visualization of the interocclusal relationship and representation of the dental surfaces to augment the 3D virtual skull model is vital. Utilizing advanced software, CBCT allows for minimum visua ...
... wounds. CBCT is used widely for planning orthognathic and facial orthomorphic surgeries, where detailed visualization of the interocclusal relationship and representation of the dental surfaces to augment the 3D virtual skull model is vital. Utilizing advanced software, CBCT allows for minimum visua ...
Review Article Use of Cone Beam Computed Tomography in
... maxillofacial CBCT can be performed with the patient in three possible positions: (1) sitting, (2) standing, and (3) supine. Equipment that requires the patient to be supine has a larger physical footprint and may not be readily accessible for patients with physical disabilities. Standing units may ...
... maxillofacial CBCT can be performed with the patient in three possible positions: (1) sitting, (2) standing, and (3) supine. Equipment that requires the patient to be supine has a larger physical footprint and may not be readily accessible for patients with physical disabilities. Standing units may ...
Integration of FDG-PET/CT into external beam radiation therapy
... of complementary image information within a single examination protocol without the need to reposition the patient (82). With the clinical adoption of combined PET/CT systems almost 15 years ago, staging and restaging of cancer patients has been improved significantly over CT- and PET-only (21). ...
... of complementary image information within a single examination protocol without the need to reposition the patient (82). With the clinical adoption of combined PET/CT systems almost 15 years ago, staging and restaging of cancer patients has been improved significantly over CT- and PET-only (21). ...
Making the difference with Philips Live Image
... ten different stand positions per clinical procedure • Another feature of the APC is reference-driven positioning. This allows you to recall stand positions by referring to the images at the reference monitors, which means that the rotation, angulation, SID, and detector orientation are restored to ...
... ten different stand positions per clinical procedure • Another feature of the APC is reference-driven positioning. This allows you to recall stand positions by referring to the images at the reference monitors, which means that the rotation, angulation, SID, and detector orientation are restored to ...
CLASSlCAL RADIATION THERAPY
... with reproducible radiation properties. A water phantom, however, poses some practical problems when used in conjunction with ion chambers and other detectors that are affected by water, unless they are designed to be waterproof. In most cases, however, the detector is encased in a thin plastic (wat ...
... with reproducible radiation properties. A water phantom, however, poses some practical problems when used in conjunction with ion chambers and other detectors that are affected by water, unless they are designed to be waterproof. In most cases, however, the detector is encased in a thin plastic (wat ...
Mammography-Chapter 8
... Targets used in combination with specific tube filters to achieve optimal energy spectra ...
... Targets used in combination with specific tube filters to achieve optimal energy spectra ...
Dynamic contrast-enhanced MRI for prostate cancer localization
... correlation between imaging and pathology. The accuracy of DCE-MRI for cancer detection was calculated by a pixel-by-pixel correlation of quantitative DCE-MRI parameter maps and pathology. In addition, a radiologist interpreted the DCE-MRI and T2W images. The location of tumour on imaging was compar ...
... correlation between imaging and pathology. The accuracy of DCE-MRI for cancer detection was calculated by a pixel-by-pixel correlation of quantitative DCE-MRI parameter maps and pathology. In addition, a radiologist interpreted the DCE-MRI and T2W images. The location of tumour on imaging was compar ...
Cone beam CT and conventional tomography for the detection of
... two planes is time-consuming and occupies the radiographic unit for a long period of time.14 In case the diagnostic accuracy of TMJ changes is not jeopardized, many advantages could be obtained with the use of the CBCT technique. A CBCT examination with the NewTomw 3G scanner is definitely much shor ...
... two planes is time-consuming and occupies the radiographic unit for a long period of time.14 In case the diagnostic accuracy of TMJ changes is not jeopardized, many advantages could be obtained with the use of the CBCT technique. A CBCT examination with the NewTomw 3G scanner is definitely much shor ...
Accuracy of linear measurement in Galileos cone beam CT under
... visualization of structures difficult. 14 Such cases may lead to overestimation of distances. The disadvantages also include limited availability of such imaging modalities and increased time to acquire the images. Pantomography is a special tomographic technique that produces a panoramic radiograph ...
... visualization of structures difficult. 14 Such cases may lead to overestimation of distances. The disadvantages also include limited availability of such imaging modalities and increased time to acquire the images. Pantomography is a special tomographic technique that produces a panoramic radiograph ...
Product Catalogue 2013/2014 Dosimetry and QA
... physics, and radiation therapy physics is the main area of activity of medical physicists worldwide. These physicists are trained to use special concepts and methods of physics to help diagnose and treat human disease, and they have collected practical experience dealing with medical problems and us ...
... physics, and radiation therapy physics is the main area of activity of medical physicists worldwide. These physicists are trained to use special concepts and methods of physics to help diagnose and treat human disease, and they have collected practical experience dealing with medical problems and us ...
Improvement of post-hypoxic action myoclonus with
... patients with Lance-Adams syndrome 16. However, very high doses of piracetam (20–45 g/day) needed to reach efficacy is not very practical and can impede compliance 17–19. Novel anti-epileptic medications such as levetiracetam and zonisamide (ZNS) have recently been described to be useful in the cont ...
... patients with Lance-Adams syndrome 16. However, very high doses of piracetam (20–45 g/day) needed to reach efficacy is not very practical and can impede compliance 17–19. Novel anti-epileptic medications such as levetiracetam and zonisamide (ZNS) have recently been described to be useful in the cont ...
Ten years have passed since the first commercial equipment for
... For clinical use, the display method of elastogram is an important factor since it is useful for diagnosis to easily relate the location in elastogram (strain image) to B-mode as a morphological image. Different types of display method are used for ultrasonographic equipment as shown in Fig. 4. For ...
... For clinical use, the display method of elastogram is an important factor since it is useful for diagnosis to easily relate the location in elastogram (strain image) to B-mode as a morphological image. Different types of display method are used for ultrasonographic equipment as shown in Fig. 4. For ...
SADMFR guidelines for the use of cone-beam computed
... dose compared to other dental X-ray imaging modalities, orthodontists and two colleagues working solely in the fields of which makes proper indication and justification much more temporomandibular disorders (TMDs) and orofacial pain. In adsensitive. The choice of exposure values, optimization of ded ...
... dose compared to other dental X-ray imaging modalities, orthodontists and two colleagues working solely in the fields of which makes proper indication and justification much more temporomandibular disorders (TMDs) and orofacial pain. In adsensitive. The choice of exposure values, optimization of ded ...
The Role of Diffusion-Weighted Imaging (DWI) in Locoregional
... The concept of DWI was first described in 1965 based on a conventional T2-weighted MR sequence [17]. The first brain diffusion-weighted imaging was reported in 1986 and became commonly used in stroke detection in the early 1990s. To date, DWI has been expanded to many applications outside neuroradio ...
... The concept of DWI was first described in 1965 based on a conventional T2-weighted MR sequence [17]. The first brain diffusion-weighted imaging was reported in 1986 and became commonly used in stroke detection in the early 1990s. To date, DWI has been expanded to many applications outside neuroradio ...
Estimativa de dose nos pulmões para procedimentos
... Figure 3 - (a). Rotating anodes spread the heat produced over a circular track, as the high energy electrons strike its surface at the so-called focal spot, creating X-ray; (b). The anode disk is made of graphite, with tungsten-rhenium deposited in one face via chemical steam process. (source: Fosbi ...
... Figure 3 - (a). Rotating anodes spread the heat produced over a circular track, as the high energy electrons strike its surface at the so-called focal spot, creating X-ray; (b). The anode disk is made of graphite, with tungsten-rhenium deposited in one face via chemical steam process. (source: Fosbi ...
RADIATION MEDICINE QA
... physics, and radiation therapy physics is the main area of activity of medical physicists worldwide. These physicists are trained to use special concepts and methods of physics to help diagnose and treat human disease, and they have collected practical experience dealing with medical problems and us ...
... physics, and radiation therapy physics is the main area of activity of medical physicists worldwide. These physicists are trained to use special concepts and methods of physics to help diagnose and treat human disease, and they have collected practical experience dealing with medical problems and us ...
Cone beam computed tomography - Its applications
... CBCT imaging employs shaped source of ionizing radiation in the form of a divergent pyramidal or cone shape which is directed through the central point of the area of interest onto an area X-ray detector present on the opposite side. There is a stationary fulcrum inside the region of interest around ...
... CBCT imaging employs shaped source of ionizing radiation in the form of a divergent pyramidal or cone shape which is directed through the central point of the area of interest onto an area X-ray detector present on the opposite side. There is a stationary fulcrum inside the region of interest around ...
Validation of experts versus atlas-based and
... From the late 1960s, with the introduction of levodopa, medications have dominated the treatment of Parkinson’s disease (PD). Unluckily, medical treatment has significant shortcomings. Benefits go down with time. Many patients suffer from wearing-off, a decrease of the medical effect following each ...
... From the late 1960s, with the introduction of levodopa, medications have dominated the treatment of Parkinson’s disease (PD). Unluckily, medical treatment has significant shortcomings. Benefits go down with time. Many patients suffer from wearing-off, a decrease of the medical effect following each ...
19 2D and 3D Planning in Brachytherapy
... The above step is indirectly considered in the external beam radiotherapy planning procedure through patient positioning and alignment respective to treatment machine gantry. The brachytherapy treatment planning procedure consists generally of the following steps: • Definition of the planning target ...
... The above step is indirectly considered in the external beam radiotherapy planning procedure through patient positioning and alignment respective to treatment machine gantry. The brachytherapy treatment planning procedure consists generally of the following steps: • Definition of the planning target ...
Breast Biopsy
... treatment, which is, ideally, a single open surgical procedure yielding excision with adequate margins. An equally important role for minimally invasive biopsy is avoiding open biopsy for benign conditions that do not require further intervention or diagnostic efforts. It is useful for those involve ...
... treatment, which is, ideally, a single open surgical procedure yielding excision with adequate margins. An equally important role for minimally invasive biopsy is avoiding open biopsy for benign conditions that do not require further intervention or diagnostic efforts. It is useful for those involve ...
A Guide to CT Radiation Dose Management
... Introduced in the early 1970s, computed tomography (CT) has become an invaluable diagnostic tool. Today, approximately 81 million CT scans are performed annually in the United States alone.1 ...
... Introduced in the early 1970s, computed tomography (CT) has become an invaluable diagnostic tool. Today, approximately 81 million CT scans are performed annually in the United States alone.1 ...
For internal use only
... and all patients gave written informed consent. Due to the fact that a new imaging modality (dynamic lowMI real time sonography) was used, a technical run-in phase was performed to allow establishment of adequate machine settings with 45 patients (5 in each center). The following 134 patients were p ...
... and all patients gave written informed consent. Due to the fact that a new imaging modality (dynamic lowMI real time sonography) was used, a technical run-in phase was performed to allow establishment of adequate machine settings with 45 patients (5 in each center). The following 134 patients were p ...