Computed tomography – an increasing source of radiation exposure
... larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the corresponding stomach dose from an abdominal CT ...
... larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the corresponding stomach dose from an abdominal CT ...
Response of borderline resectable pancreatic cancer to
... without evidence of arterial involvement or occlusion of the SMV-PV had BLR disease according to Americas Hepatopancreatobiliary Association (AHPBA), Society of Surgical Oncology (SSO), and Society for Surgery of the Alimentary Tract (SSAT) (AHPBA/SSO/SSAT) criteria but had potentially resectable (P ...
... without evidence of arterial involvement or occlusion of the SMV-PV had BLR disease according to Americas Hepatopancreatobiliary Association (AHPBA), Society of Surgical Oncology (SSO), and Society for Surgery of the Alimentary Tract (SSAT) (AHPBA/SSO/SSAT) criteria but had potentially resectable (P ...
Common and Uncommon Extrasspinal Findings on
... Department of Radiology, Henry Ford Hospital Detroit, MI ...
... Department of Radiology, Henry Ford Hospital Detroit, MI ...
Volumetric HIFU Ablation under 3D Guidance of Rapid MRI
... M. Köhler1, C. Mougenot2,3, B. Quesson3, J. Enholm1, B. Lebail4, C. Laurent5, C. Moonen3, and G. Ehnholm1 Philips Medical Systems, Vantaa, Finland, 2Philips Medical Systems, France, 3Laboratory for Molecular and Functional Imaging, Bordeaux, France, 4Laboratory of Anatomopathology, Pellegrin Hospita ...
... M. Köhler1, C. Mougenot2,3, B. Quesson3, J. Enholm1, B. Lebail4, C. Laurent5, C. Moonen3, and G. Ehnholm1 Philips Medical Systems, Vantaa, Finland, 2Philips Medical Systems, France, 3Laboratory for Molecular and Functional Imaging, Bordeaux, France, 4Laboratory of Anatomopathology, Pellegrin Hospita ...
NSS-MIC-todd-Poster
... cancers, and facilities such as the Loma Linda Proton Treatment Center and Paul Scherer Institute (PSI) [1] have active clinical proton radiation therapy programs. The primary objective of any radiation therapy is to deliver a high dose of radiation to the tumor, while limiting the radiation dose to ...
... cancers, and facilities such as the Loma Linda Proton Treatment Center and Paul Scherer Institute (PSI) [1] have active clinical proton radiation therapy programs. The primary objective of any radiation therapy is to deliver a high dose of radiation to the tumor, while limiting the radiation dose to ...
An Attempt to Establish National Dose Reference Levels for
... 1970s, CT has been used intensively and demand for this imaging modality has increas ed rapidly. It is estimated that more than 62 million CT scans per year currently take place in the United States, including at least 4 million in pediatric [6]. By its nature, CT involves larger radiation doses fro ...
... 1970s, CT has been used intensively and demand for this imaging modality has increas ed rapidly. It is estimated that more than 62 million CT scans per year currently take place in the United States, including at least 4 million in pediatric [6]. By its nature, CT involves larger radiation doses fro ...
Period 11 Activity Solutions: Ionizing Radiation and Health
... b) How do the trails of alpha particles compare with those of beta particles? Why? Alpha particles are much heavier than beta particles, so the alpha particles will leave denser trails. For the same reason, the alpha particles lose energy faster and travel a shorter distance than the beta particles. ...
... b) How do the trails of alpha particles compare with those of beta particles? Why? Alpha particles are much heavier than beta particles, so the alpha particles will leave denser trails. For the same reason, the alpha particles lose energy faster and travel a shorter distance than the beta particles. ...
Computed tomography--an increasing source of radiation exposure.
... larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the corresponding stomach dose from an abdominal CT ...
... larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the corresponding stomach dose from an abdominal CT ...
Would Magnetic Resonance Spectroscopy (MRS)
... subspecialty expertise in MRS be present to supervise the study. This radiologist verifies the validity of the indication, determines the placement of the voxel(s), supervises the study, and ensures appropriate quality. This is one reason why these cases are only scheduled during times when a radiol ...
... subspecialty expertise in MRS be present to supervise the study. This radiologist verifies the validity of the indication, determines the placement of the voxel(s), supervises the study, and ensures appropriate quality. This is one reason why these cases are only scheduled during times when a radiol ...
Establishing national diagnostic reference levels for digital
... [4] NHS Breast Screening Programme Publication Number 54, UK, February 2003 [5] Ionising Radiation (Medical Exposure) Regulations, (SI 2000 No 1059), UK:HMSO, 2000 [6] Dosimetry Working Party of the Institute of Physical Sciences in Medicine. National protocol for patient dose measurements in diagno ...
... [4] NHS Breast Screening Programme Publication Number 54, UK, February 2003 [5] Ionising Radiation (Medical Exposure) Regulations, (SI 2000 No 1059), UK:HMSO, 2000 [6] Dosimetry Working Party of the Institute of Physical Sciences in Medicine. National protocol for patient dose measurements in diagno ...
How do we achieve Optimization?
... Contrast results from the removal of photons from the primary beam Photoelectric Effect Probability Z3 Good contrast, but higher dose as photons Compton Scattering Low contrast (Tissue density alone) Scattered photons add to noise More Photoelectric, greater contrast; less noise ...
... Contrast results from the removal of photons from the primary beam Photoelectric Effect Probability Z3 Good contrast, but higher dose as photons Compton Scattering Low contrast (Tissue density alone) Scattered photons add to noise More Photoelectric, greater contrast; less noise ...
Scopes of Practice and Qualifications 01.08.2013 (pdf - 143
... Radiation Therapists are responsible for the planning and delivery of radiation treatment, primarily for people diagnosed with cancer. Radiation Therapists create and evaluate images for the localisation, planning and delivery of radiation treatment according to the prescription of the Radiation Onc ...
... Radiation Therapists are responsible for the planning and delivery of radiation treatment, primarily for people diagnosed with cancer. Radiation Therapists create and evaluate images for the localisation, planning and delivery of radiation treatment according to the prescription of the Radiation Onc ...
Medical radiation exposure and accidents. Dosimetry and radiation
... It was recently shown that the new prospectively gated 16-sliced coronary CT angiography (CTA) is lowering the radiation dose to the patient as compared to the standard retrospectively gated 64-slice coronary CTA, from 10-25mSv to about 1mSv [21]. While scanning times today are much shorter, taking ...
... It was recently shown that the new prospectively gated 16-sliced coronary CT angiography (CTA) is lowering the radiation dose to the patient as compared to the standard retrospectively gated 64-slice coronary CTA, from 10-25mSv to about 1mSv [21]. While scanning times today are much shorter, taking ...
Cone Beam Imaging in Patients with Temporomandibular Disorders.
... (adj) abnormal, unnatural (not normal; not typical or usual or regular or conforming to a norm) "abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food” (adj) abnormal (departing from the normal in e.g. intelligence and development) "th ...
... (adj) abnormal, unnatural (not normal; not typical or usual or regular or conforming to a norm) "abnormal powers of concentration"; "abnormal amounts of rain"; "abnormal circumstances"; "an abnormal interest in food” (adj) abnormal (departing from the normal in e.g. intelligence and development) "th ...
Slice Wars vs Dose Wars in Multiple
... thinner slices (high spatial resolution) requires higher tube current to maintain good image quality. In addition, in certain cardiac CT protocols (retrospective electrocardiographically gated), excessive tissue overlaps (low pitch) are required to ensure that the entire region is captured during he ...
... thinner slices (high spatial resolution) requires higher tube current to maintain good image quality. In addition, in certain cardiac CT protocols (retrospective electrocardiographically gated), excessive tissue overlaps (low pitch) are required to ensure that the entire region is captured during he ...
To: - MAASTRO clinic
... a constant drive to provide the best, cutting edge treatment care to its patients. This appetite for improvement also includes exploring new imaging modalities to optimize treatment delivery and increase survival and favorable treatment outcome. Dynamic contrast-enhanced computed tomography (DCE-CT ...
... a constant drive to provide the best, cutting edge treatment care to its patients. This appetite for improvement also includes exploring new imaging modalities to optimize treatment delivery and increase survival and favorable treatment outcome. Dynamic contrast-enhanced computed tomography (DCE-CT ...
Is Beta-blockade necessary to obtain diagnostic image
... 92 females) were enrolled in this prospective study (Flowchart, figure 1); their clinical characteristics and cardiovascular risk factors are given in table 1, and in figures 2 and 3. 47 patients were receiving an oral beta-blocker as part of baseline medication, and 56 patients were prepared by re ...
... 92 females) were enrolled in this prospective study (Flowchart, figure 1); their clinical characteristics and cardiovascular risk factors are given in table 1, and in figures 2 and 3. 47 patients were receiving an oral beta-blocker as part of baseline medication, and 56 patients were prepared by re ...
Finding Canavan disease, and diagnostic hallmark MR
... cases. Canavan disease has rapidly progressive clinical course and poor outcomes with a mean survival time of 3 years2,3. Poor suck and head control problems indicating early hypotonia were also recognized by parents of our patient. Abnormal large head was accompanying the findings, however, hyperto ...
... cases. Canavan disease has rapidly progressive clinical course and poor outcomes with a mean survival time of 3 years2,3. Poor suck and head control problems indicating early hypotonia were also recognized by parents of our patient. Abnormal large head was accompanying the findings, however, hyperto ...
Radiation and You - What is the risk?
... Computed Tomography (CT) uses more radiation than a plain x-ray because it produces a more detailed image. Many of the recent news items have concerned CT, due to its growing use in diagnosing many disease processes. This diagnostic benefit may outweigh the radiation risk, so patients and their refe ...
... Computed Tomography (CT) uses more radiation than a plain x-ray because it produces a more detailed image. Many of the recent news items have concerned CT, due to its growing use in diagnosing many disease processes. This diagnostic benefit may outweigh the radiation risk, so patients and their refe ...
Does Ready Access to Clinical Information Reduce Turn Around
... residents. There are a total of 173 clinical attendings, fellows, and residents at JHH. Average TAT for the 96hour down time period (8681 studies) were compared to a 96-hour up time period (9282 studies) for the immediately preceding week. For the department as a whole, TAT was 18.3% faster during t ...
... residents. There are a total of 173 clinical attendings, fellows, and residents at JHH. Average TAT for the 96hour down time period (8681 studies) were compared to a 96-hour up time period (9282 studies) for the immediately preceding week. For the department as a whole, TAT was 18.3% faster during t ...
1 - Healthcare Improvement Scotland
... problematic nature of these surveys and the danger of attempting to draw conclusions from them. They sent survey questionnaires to 292 physicians, who referred 744 consecutive lung cancer patients for FDG-PET. Only 48% of the physicians responded to the questionnaire and this covered just 37% of the ...
... problematic nature of these surveys and the danger of attempting to draw conclusions from them. They sent survey questionnaires to 292 physicians, who referred 744 consecutive lung cancer patients for FDG-PET. Only 48% of the physicians responded to the questionnaire and this covered just 37% of the ...
predicting the location and probability of viable tumor within
... in this field of research (McMillan, et al.) by weighting the importance of certain MRI markers over others. A multi-parametric approach in MRI may offer a more accurate assessment of GBM tumor invasion which in turn ...
... in this field of research (McMillan, et al.) by weighting the importance of certain MRI markers over others. A multi-parametric approach in MRI may offer a more accurate assessment of GBM tumor invasion which in turn ...
Article in PDF
... of brain tumors, complex tumor morphology, and their treatment protocol including chemotherapy or radiotherapy makes radiological assessment in discriminating tumor recurrence from the inflammatory or necrotic change due to treatment with radiation and/or chemotherapy. Both of these entities typical ...
... of brain tumors, complex tumor morphology, and their treatment protocol including chemotherapy or radiotherapy makes radiological assessment in discriminating tumor recurrence from the inflammatory or necrotic change due to treatment with radiation and/or chemotherapy. Both of these entities typical ...
HYPERARC High-definition radiotherapy
... Radiation treatments may cause side effects that can vary depending on the part of the body being treated. The most frequent ones are typically temporary and may include, but are not limited to, irritation to the respiratory, digestive, urinary or reproductive systems, fatigue, nausea, skin irritati ...
... Radiation treatments may cause side effects that can vary depending on the part of the body being treated. The most frequent ones are typically temporary and may include, but are not limited to, irritation to the respiratory, digestive, urinary or reproductive systems, fatigue, nausea, skin irritati ...
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.