Research Center for Radiation Therapy
... On advice from its legal advisor Comair left the Center after stage 1 to avoid leakage of internal know-how to other partners. C-RAD Imaging AB (former name RayTherapy Imaging): Gas Electron Multipliers. C-RAD Imaging develops a fast, sensitive and cost effective radiation detector based on GEMtechn ...
... On advice from its legal advisor Comair left the Center after stage 1 to avoid leakage of internal know-how to other partners. C-RAD Imaging AB (former name RayTherapy Imaging): Gas Electron Multipliers. C-RAD Imaging develops a fast, sensitive and cost effective radiation detector based on GEMtechn ...
Proton Beam Therapy at UCLH
... • Imaging is WITHOUT QUESTION the most important challenge for proton therapy. • High resolution imaging required for treatment planning. • Imaging required between fractions to monitor changes in patient anatomy/tumour volume. • In an ideal world: – Real-time imaging DURING TREATMENT to EXACTLY whe ...
... • Imaging is WITHOUT QUESTION the most important challenge for proton therapy. • High resolution imaging required for treatment planning. • Imaging required between fractions to monitor changes in patient anatomy/tumour volume. • In an ideal world: – Real-time imaging DURING TREATMENT to EXACTLY whe ...
diabetes - NC State University
... 1. Understand the concepts of exposure, dose equivalent, absorbed dose, weighting (quality) factor for electromagnetic and particulate radiation. Understand the relationship between roentgens, rads, and rems ...
... 1. Understand the concepts of exposure, dose equivalent, absorbed dose, weighting (quality) factor for electromagnetic and particulate radiation. Understand the relationship between roentgens, rads, and rems ...
Orbital(Osteoma(
... woven bones. Osteoid osteomas can occur in any bone, but in approximately two thirds of patients, the appendicular skeleton is involved. These lesions are encountered infrequently in the skull and facial bo ...
... woven bones. Osteoid osteomas can occur in any bone, but in approximately two thirds of patients, the appendicular skeleton is involved. These lesions are encountered infrequently in the skull and facial bo ...
The use of 3D facial imaging and 3D cone beam CT
... location to another. Altitude also plays an important role as people living at higher elevations can receive up to 1500 micro Sv more per year than those living at sea level. The dose from cosmic X-rays during a coast to coast flight in the US is about 30 Micro Sv. Table 1 compares common dental pro ...
... location to another. Altitude also plays an important role as people living at higher elevations can receive up to 1500 micro Sv more per year than those living at sea level. The dose from cosmic X-rays during a coast to coast flight in the US is about 30 Micro Sv. Table 1 compares common dental pro ...
Treatment Planning Target and Structure Definition
... A multi-slice CT scanner is used and the couch speed is reduced to accommodate breathing cycle During the scanning the patient’s breathing phase is monitored using a device such as Philips Bellows, Varian’s Real-time Position Management System (RPM) or Elekta’s Active Breathing Coordinator (ABC). ...
... A multi-slice CT scanner is used and the couch speed is reduced to accommodate breathing cycle During the scanning the patient’s breathing phase is monitored using a device such as Philips Bellows, Varian’s Real-time Position Management System (RPM) or Elekta’s Active Breathing Coordinator (ABC). ...
GE CT Clarity - UW Radiology - University of Wisconsin–Madison
... to the particular clinical indication. These are often straightforward (such as a known cancer follow-up) and we only employ a single scan sequence.” This eliminates those multiple sequence studies that are not needed for diagnosis. The more sequences performed the more dose the patient gets, and th ...
... to the particular clinical indication. These are often straightforward (such as a known cancer follow-up) and we only employ a single scan sequence.” This eliminates those multiple sequence studies that are not needed for diagnosis. The more sequences performed the more dose the patient gets, and th ...
Full Text - European Heart Journal
... 130 patients (21%). Atropine was added in 78 patients (40%). Atropine was more frequently administered in patients using B-blocker therapy (41 of 66 patients, 62%) than in those not taking B-blockers (37 of 128, 29%, P , 0.0001). Adverse effects during ...
... 130 patients (21%). Atropine was added in 78 patients (40%). Atropine was more frequently administered in patients using B-blocker therapy (41 of 66 patients, 62%) than in those not taking B-blockers (37 of 128, 29%, P , 0.0001). Adverse effects during ...
X-ray Technician Refresher Training
... Basic Components of X-ray Tube • Cathode – heated wire to produce large source of electrons and focusing cup to direct them • Anode – target of high atomic number struck by electrons to produce X-rays • Voltage supply – high voltage supply to accelerate electrons from cathode to anode ...
... Basic Components of X-ray Tube • Cathode – heated wire to produce large source of electrons and focusing cup to direct them • Anode – target of high atomic number struck by electrons to produce X-rays • Voltage supply – high voltage supply to accelerate electrons from cathode to anode ...
Full PDF - Emergency Medicine Cases
... the health care system beyond what may be seen with an isolated ED visit. Patients with renal colic are likely to undergo multiple imaging investigations over their lifetime, including CT.15 There is increasing concern about cumulative radiation exposure from CT imaging, particularly since previous ...
... the health care system beyond what may be seen with an isolated ED visit. Patients with renal colic are likely to undergo multiple imaging investigations over their lifetime, including CT.15 There is increasing concern about cumulative radiation exposure from CT imaging, particularly since previous ...
Refresher Training for X-Ray Equipment Operators
... Basic Components of X-ray Tube • Cathode – heated wire to produce large source of electrons and focusing cup to direct them • Anode – target of high atomic number struck by electrons to produce X-rays • Voltage supply – high voltage supply to accelerate electrons from cathode to anode ...
... Basic Components of X-ray Tube • Cathode – heated wire to produce large source of electrons and focusing cup to direct them • Anode – target of high atomic number struck by electrons to produce X-rays • Voltage supply – high voltage supply to accelerate electrons from cathode to anode ...
Changes in the surgical management of patients with breast
... depending on the specific criteria used, may range from 7% to 63%.3– 6 Nonetheless, with the overall high incidence of breast carcinoma in Western cultures, a significant number of women can be expected to have multifocal or multicentric disease at presentation and, thus, may not be ideal candidates f ...
... depending on the specific criteria used, may range from 7% to 63%.3– 6 Nonetheless, with the overall high incidence of breast carcinoma in Western cultures, a significant number of women can be expected to have multifocal or multicentric disease at presentation and, thus, may not be ideal candidates f ...
Tech Guide
... on UNSCEAR scientific data. Reports addressing all aspects of protection against ionising radiation are issued as numbered publications. ICRP 60 (1) published in 1990 forms the basis of current legislation. A new set of fundamen- ...
... on UNSCEAR scientific data. Reports addressing all aspects of protection against ionising radiation are issued as numbered publications. ICRP 60 (1) published in 1990 forms the basis of current legislation. A new set of fundamen- ...
DoseWatch - GE Healthcare
... and verification of CT protocols within a facility’s practice and is recognized by the Joint Commission, American College of Radiology (ACR) and American Association of Physicists in Medicine (AAPM) as an essential activity in ensuring patient safety and maintaining image quality.1 Protocol settings ...
... and verification of CT protocols within a facility’s practice and is recognized by the Joint Commission, American College of Radiology (ACR) and American Association of Physicists in Medicine (AAPM) as an essential activity in ensuring patient safety and maintaining image quality.1 Protocol settings ...
Positron Emission Tomography/Computed Tomography Findings in
... cannot be used for evaluation of therapy response since bone does not mineralize with cure (6). MR has the advantage of superior demonstration of soft tissue, particularly dural enhancement and involvement of medullary bone spaces, but it also cannot be used for assessment of bone erosion and treatm ...
... cannot be used for evaluation of therapy response since bone does not mineralize with cure (6). MR has the advantage of superior demonstration of soft tissue, particularly dural enhancement and involvement of medullary bone spaces, but it also cannot be used for assessment of bone erosion and treatm ...
IX. H. Quality Control Monitors and Imaging Formatter
... These guidelines are an educational tool designed to assist practitioners in providing appropriate care for patients. They are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care. For these reasons and those set forth ...
... These guidelines are an educational tool designed to assist practitioners in providing appropriate care for patients. They are not inflexible rules or requirements of practice and are not intended, nor should they be used, to establish a legal standard of care. For these reasons and those set forth ...
Imaging strategies to reduce the risk of radiation in CT studies
... CT examination (18,19). Although the form of radiation delivered by atomic bombs (gamma radiation) is different from that used in radiology (x-radiation), there is fundamentally no difference in the carcinogenic potential (4). The average number of CT scans conducted for a given medical problem is t ...
... CT examination (18,19). Although the form of radiation delivered by atomic bombs (gamma radiation) is different from that used in radiology (x-radiation), there is fundamentally no difference in the carcinogenic potential (4). The average number of CT scans conducted for a given medical problem is t ...
CT Radiation Dose Reduction by Modifying Primary Factors
... radiation dose optimization should imply a single–tube current acquisition of a scan series, not a single– tube current scanning of all patients or clinical indications. Patient age and size, clinical indication, and the body region being imaged should determine specific fixed tube current values. Y ...
... radiation dose optimization should imply a single–tube current acquisition of a scan series, not a single– tube current scanning of all patients or clinical indications. Patient age and size, clinical indication, and the body region being imaged should determine specific fixed tube current values. Y ...
SENSORS
... based on inconel and Pt-Bi with improved characteristics compared to Co, V or Rh and Pt SPNDs will be developed. The advantages of inconel SPNDs include prompt response and low burn-up and hence longer life. Use of Pt-Bi detector pair detectors would help to eliminate the gamma signal that gives shi ...
... based on inconel and Pt-Bi with improved characteristics compared to Co, V or Rh and Pt SPNDs will be developed. The advantages of inconel SPNDs include prompt response and low burn-up and hence longer life. Use of Pt-Bi detector pair detectors would help to eliminate the gamma signal that gives shi ...
Appropriate Use Criteria for Ventilation Perfusion Imaging in
... preferred procedure for the diagnosis of PE. However, CTPA may be contraindicated in some patients, such as those with contrast allergy and renal failure, and at the same time, CTPA is not 100% accurate for the diagnosis of PE in all patients. Therefore, in many patients the use of V/Q scintigraphy ...
... preferred procedure for the diagnosis of PE. However, CTPA may be contraindicated in some patients, such as those with contrast allergy and renal failure, and at the same time, CTPA is not 100% accurate for the diagnosis of PE in all patients. Therefore, in many patients the use of V/Q scintigraphy ...
9 Three-Dimensional Treatment Planning and Conformal Therapy
... reproduce the planned dose distribution, remains a difficult technical aspect of the 3DCRT process. Errors may occur if patients are inadequately immobilized, with resultant treatment fields inaccurately aligned from treatment to treatment (interfraction). In addition, patients and/or their tumor vo ...
... reproduce the planned dose distribution, remains a difficult technical aspect of the 3DCRT process. Errors may occur if patients are inadequately immobilized, with resultant treatment fields inaccurately aligned from treatment to treatment (interfraction). In addition, patients and/or their tumor vo ...
Image-guided radiation therapy (IGRT): practical
... issue in RT in pediatric patients. The childhood cancer survivor study reported the results of 14,359 patients cured of a childhood cancer: 1402 of them developed a second neoplasm, with a cumulative incidence at 30 years of 20.5 % In a multivariate analysis, RT associated with age (< or >15 years), ...
... issue in RT in pediatric patients. The childhood cancer survivor study reported the results of 14,359 patients cured of a childhood cancer: 1402 of them developed a second neoplasm, with a cumulative incidence at 30 years of 20.5 % In a multivariate analysis, RT associated with age (< or >15 years), ...
Quality Assurance for Clinical Trials
... (NCI)-funded] clinical trials. About 25% of these centers participate actively in that they treat more than 12 patients per year under protocol. In all cases, specific quality assurance (QA) procedures need to be performed by the physicist to either be eligible for membership in the cooperative grou ...
... (NCI)-funded] clinical trials. About 25% of these centers participate actively in that they treat more than 12 patients per year under protocol. In all cases, specific quality assurance (QA) procedures need to be performed by the physicist to either be eligible for membership in the cooperative grou ...
Urothelial cancers: clinical and imaging evaluation
... invasion in bladder cancer patients (23). A relatively less invasive nature, lack of any requirement for an intravenous contrast agent, and repeatability are among the main advantages of US; however, operator dependence, difficulty in cases of patient obesity, and abdominal gas superposition are amo ...
... invasion in bladder cancer patients (23). A relatively less invasive nature, lack of any requirement for an intravenous contrast agent, and repeatability are among the main advantages of US; however, operator dependence, difficulty in cases of patient obesity, and abdominal gas superposition are amo ...
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.