The World`s First Adaptive Scanner
... and redefine – the “As Low as Reasonably Achievable” (ALARA) principle to reduce radiation dose to the lowest possible level. This lies at the heart of our CARE (Combined Applications to Reduce Exposure) research and development philosophy. Over the years, Siemens has been highly successful in integ ...
... and redefine – the “As Low as Reasonably Achievable” (ALARA) principle to reduce radiation dose to the lowest possible level. This lies at the heart of our CARE (Combined Applications to Reduce Exposure) research and development philosophy. Over the years, Siemens has been highly successful in integ ...
Integrated imaging – the complementary roles of radiology and
... arrays for the simultaneous collection of data at different slice locations, allowing rapid acquisition of large datasets of longitudinal volumes. The optimal MRI field strength in general clinical practice is 1.5 tesla (T), while 3 T allows mapping of cerebral cortical function by utilising blood o ...
... arrays for the simultaneous collection of data at different slice locations, allowing rapid acquisition of large datasets of longitudinal volumes. The optimal MRI field strength in general clinical practice is 1.5 tesla (T), while 3 T allows mapping of cerebral cortical function by utilising blood o ...
CT Accreditation Program: Image Quality and Dose
... The appropriate subfields of medical physics for CT Accreditation are Diagnostic Radiological Physics and Radiological Physics. Continuing education for a qualified medical physicist should be in accordance with the ACR Standard for Continuing Education (CME). The qualified medical physicist must be ...
... The appropriate subfields of medical physics for CT Accreditation are Diagnostic Radiological Physics and Radiological Physics. Continuing education for a qualified medical physicist should be in accordance with the ACR Standard for Continuing Education (CME). The qualified medical physicist must be ...
Photoreceptor Structure and Function in Patients
... virus (AAV) gene therapy. In animal models of human achromatopsia, cone ERG amplitudes recovered to nearly normal levels.12–14 These results from proof-of-principle experiments in animals with cone-directed gene therapy offer promise for eventual translation to human patients. Identifying and then t ...
... virus (AAV) gene therapy. In animal models of human achromatopsia, cone ERG amplitudes recovered to nearly normal levels.12–14 These results from proof-of-principle experiments in animals with cone-directed gene therapy offer promise for eventual translation to human patients. Identifying and then t ...
Real-time Position Management™ System
... patient-friendly, video-based system that compensates for target motion, enabling improved imaging and treatment in areas such as lung, breast and upper abdominal sites. RPM is accurate and easy-to-use, and provides both respiratory gating for respiration-synchronized imaging and treatment, as well ...
... patient-friendly, video-based system that compensates for target motion, enabling improved imaging and treatment in areas such as lung, breast and upper abdominal sites. RPM is accurate and easy-to-use, and provides both respiratory gating for respiration-synchronized imaging and treatment, as well ...
Guidance for Compliance Testing for Phototimer (AEC) Systems The
... Although radiographic timers are almost always tested, the AEC (phototiming systems) Testing is done a non-uniform manner throughout the regulated community. This document Addresses the routine QC testing that is to be done in the regulated community for Phototimer systems and presented to Inspector ...
... Although radiographic timers are almost always tested, the AEC (phototiming systems) Testing is done a non-uniform manner throughout the regulated community. This document Addresses the routine QC testing that is to be done in the regulated community for Phototimer systems and presented to Inspector ...
Measurement of Pituitary Gland Height with MR Imaging
... immediately posterior to the gland (figs. 1,2,5, and 6). Rarely , a small focus of marrow signal is identified at the tuberculum anteriorly. Since neither air nor cortical bone yields MR signals, variations in sphenoid sinus development inferiorly do not vary the MR image or affect the measurement. ...
... immediately posterior to the gland (figs. 1,2,5, and 6). Rarely , a small focus of marrow signal is identified at the tuberculum anteriorly. Since neither air nor cortical bone yields MR signals, variations in sphenoid sinus development inferiorly do not vary the MR image or affect the measurement. ...
Manuscript_25_07_2014 - Imperial Spiral
... varies between countries, regions and hospitals. This prospective, multi-centre, comparative effectiveness study was designed to assess the relative accuracy of commonly used imaging techniques for identifying patients with significant CAD. Methods and Results – A total of 475 patients with stable c ...
... varies between countries, regions and hospitals. This prospective, multi-centre, comparative effectiveness study was designed to assess the relative accuracy of commonly used imaging techniques for identifying patients with significant CAD. Methods and Results – A total of 475 patients with stable c ...
Radiology
... CPT® copyright 2012 American Medical Association. All rights reserved. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT®, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medi ...
... CPT® copyright 2012 American Medical Association. All rights reserved. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT®, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medi ...
Imaging Findings of Bisphosphonate
... Objectives. This paper offers a critical review of published information on the imaging strategies used for diagnosing bisphosphonate-associated osteonecrosis of the jaw (BRONJ) in patients taking intravenous bisphosphonates, pointing at the different methodologies and results of existing literature ...
... Objectives. This paper offers a critical review of published information on the imaging strategies used for diagnosing bisphosphonate-associated osteonecrosis of the jaw (BRONJ) in patients taking intravenous bisphosphonates, pointing at the different methodologies and results of existing literature ...
Draft Radiation Guideline 6 - Computed Tomography
... monitoring essential for maintaining optimum image quality. It is important that the performance level of each apparatus is established during acceptance testing, and that performance standards are maintained over time by an appropriate quality assurance program. Inadequate performance and quality a ...
... monitoring essential for maintaining optimum image quality. It is important that the performance level of each apparatus is established during acceptance testing, and that performance standards are maintained over time by an appropriate quality assurance program. Inadequate performance and quality a ...
positron emission tomography/computed tomography in locally
... if there is no clinical response due to the presence of scar tissue, full pathological response may be seen because of the disappearance of tumour cells. Clinical examination alone is not reliable in the evaluation of response to chemotherapy [25, 26]. Changes in tumour size are measured by anatomic ...
... if there is no clinical response due to the presence of scar tissue, full pathological response may be seen because of the disappearance of tumour cells. Clinical examination alone is not reliable in the evaluation of response to chemotherapy [25, 26]. Changes in tumour size are measured by anatomic ...
01 - Use of a dDVH decomposition technique to evaluate
... Intensity modulated radiation therapy (IMRT) plays an important role in the treatment of patients with head and neck cancer. As the highly conformal dose distribution that is achievable with IMRT makes it possible to envisage an increase in physical dose while still maintaining the dose to the OAR a ...
... Intensity modulated radiation therapy (IMRT) plays an important role in the treatment of patients with head and neck cancer. As the highly conformal dose distribution that is achievable with IMRT makes it possible to envisage an increase in physical dose while still maintaining the dose to the OAR a ...
metomidate positron emission tomography after dexamethasone
... tumour SUV. Mechanisms involved in this pattern of response may include the diurnal alterations, as supported by a single observation in one patient who did not receive dexamethasone and nevertheless showed an increase of the normal adrenal uptake and of the tumour-to-normal adrenal ratio at the sec ...
... tumour SUV. Mechanisms involved in this pattern of response may include the diurnal alterations, as supported by a single observation in one patient who did not receive dexamethasone and nevertheless showed an increase of the normal adrenal uptake and of the tumour-to-normal adrenal ratio at the sec ...
View Presentation Document
... optimize patient care from the time imaging is first considered until referring physicians and patients fully understand the imaging results and ...
... optimize patient care from the time imaging is first considered until referring physicians and patients fully understand the imaging results and ...
General Principles of Tomography
... Beam energy incident on each block unknown Four m’s, each for a different & unknown energy ...
... Beam energy incident on each block unknown Four m’s, each for a different & unknown energy ...
Print this article
... ommended radiologists to ask women about their pregnancy status and menstrual date before radiological testing (2). In 2007, Applegate initially clarified the need for such guideline and stated what aspects it should include. According to his statement, this guideline should address the method of sc ...
... ommended radiologists to ask women about their pregnancy status and menstrual date before radiological testing (2). In 2007, Applegate initially clarified the need for such guideline and stated what aspects it should include. According to his statement, this guideline should address the method of sc ...
Foreword: Radiology Select Volume 5—Radiation Dose and
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
... for aid in accurately diagnosing disease or injury and guiding therapy, the collective radiation dose delivered to the U.S. population from medical imaging has increased six-fold since the 1980s (1,2). This has resulted in substantial concern from physicians, patients, and regulators. Consequently, ...
Abdominal radiography - American College of Radiology
... abdominal radiograph and an upright chest radiograph with elimination of a horizontal beam view of the abdomen may be performed without loss of significant diagnostic information [45,46]. A single supine view of the abdomen may be diagnostic in many cases, particularly in follow-up, while minimizing ...
... abdominal radiograph and an upright chest radiograph with elimination of a horizontal beam view of the abdomen may be performed without loss of significant diagnostic information [45,46]. A single supine view of the abdomen may be diagnostic in many cases, particularly in follow-up, while minimizing ...
Radiation Protection and Performance Evaluation of PET-CT
... Therefore, PET-CT scanner should be tested on installation and monitored by a Nuclear Medicine Medical Physicist (NMMP) to ensure proper functioning within the manufacturers’ specifications and accepted performance standards. The scope of this document is to present a guideline on radiation protecti ...
... Therefore, PET-CT scanner should be tested on installation and monitored by a Nuclear Medicine Medical Physicist (NMMP) to ensure proper functioning within the manufacturers’ specifications and accepted performance standards. The scope of this document is to present a guideline on radiation protecti ...
REVIEWS - Dental and Medical Problems
... the angulation of roots. A lateral cephalogram could prove insufficient when it comes to assessing the asymmetrical defects of a facial skeleton. Although posterior-anterior cephalograms can to a certain extent prove useful in the assessment of craniofacial asymmetry, their accuracy representing d ...
... the angulation of roots. A lateral cephalogram could prove insufficient when it comes to assessing the asymmetrical defects of a facial skeleton. Although posterior-anterior cephalograms can to a certain extent prove useful in the assessment of craniofacial asymmetry, their accuracy representing d ...
Magnetic Resonance Imaging of the Breast
... • Using contrast enhancement, MRI of the breast has become an increasingly useful clinical test. • MRI of the breast requires the use of an (IV) contrast agent to define areas of possible malignancy. • There is no data to support the use of MRI as a screening tool. • Screening mammography generally ...
... • Using contrast enhancement, MRI of the breast has become an increasingly useful clinical test. • MRI of the breast requires the use of an (IV) contrast agent to define areas of possible malignancy. • There is no data to support the use of MRI as a screening tool. • Screening mammography generally ...
Clinical commissioning and use of the Novalis Tx linear accelerator
... our initial clinical experience, described in this report, we demonstrate that the NTX is a robust system, with the image guidance and MLC requirements to treat a wide variety of sites — in particular for highly accurate delivery of SRS and SBRT-based treatments. PACS numbers: 87.55.Qr, 87.53.Ly, 87 ...
... our initial clinical experience, described in this report, we demonstrate that the NTX is a robust system, with the image guidance and MLC requirements to treat a wide variety of sites — in particular for highly accurate delivery of SRS and SBRT-based treatments. PACS numbers: 87.55.Qr, 87.53.Ly, 87 ...
Diagnostic Reference Levels in Medical Imaging
... unnecessary tissue doses being received by patients in general and, therefore, helps avoid unnecessary risk for the associated radiation health effects. Definitions and Examples (15) Definitions of the terms general medical imaging task, more specific medical imaging task, and specified medical imag ...
... unnecessary tissue doses being received by patients in general and, therefore, helps avoid unnecessary risk for the associated radiation health effects. Definitions and Examples (15) Definitions of the terms general medical imaging task, more specific medical imaging task, and specified medical imag ...
A Nurse`s Guide to Nuclear Medicine Aims: 1. To enable nurses to
... After about one hour of rest a gamma camera will be used to take pictures of the radiopharmaceutical in the heart muscle. The patient will be asked to lie flat on their back on an imaging couch and they will need to raise one or both arms above their head in order to allow the gamma camera to come c ...
... After about one hour of rest a gamma camera will be used to take pictures of the radiopharmaceutical in the heart muscle. The patient will be asked to lie flat on their back on an imaging couch and they will need to raise one or both arms above their head in order to allow the gamma camera to come c ...
Neutron capture therapy of cancer
Neutron capture therapy (NCT) is a noninvasive therapeutic modality for treating locally invasive malignant tumors such as primary brain tumors and recurrent head and neck cancer. It is a two step procedure: first, the patient is injected with a tumor localizing drug containing a non-radioactive isotope that has a high propensity or cross section (σ) to capture slow neutrons. The cross section of the capture agent is many times greater than that of the other elements present in tissues such as hydrogen, oxygen, and nitrogen. In the second step, the patient is radiated with epithermal neutrons, which after losing energy as they penetrate tissue, are absorbed by the capture agent which subsequently emits high-energy charged particles, thereby resulting in a biologically destructive nuclear reaction (Fig.1).All of the clinical experience to date with NCT is with the non-radioactive isotope boron-10, and this is known as boron neutron capture therapy (BNCT). At this time, the use of other non-radioactive isotopes, such as gadolinium, has been limited, and to date, it has not been used clinically. BNCT has been evaluated clinically as an alternative to conventional radiation therapy for the treatment of malignant brain tumors (gliomas), and more recently, recurrent, locally advanced head and neck cancer.