3 JCI dosimetry for CT
... Refer to the form: UNSCEAR: Forms/Diagnostic/CT/1.0. Fill in the hospital name and room number/name. Fill in date and type of examination, refer to Table 4-3. Record the patient ID, ethnic group, sex, age, weight and height. Record the study parameters as displayed on the CT console monitor, such ...
... Refer to the form: UNSCEAR: Forms/Diagnostic/CT/1.0. Fill in the hospital name and room number/name. Fill in date and type of examination, refer to Table 4-3. Record the patient ID, ethnic group, sex, age, weight and height. Record the study parameters as displayed on the CT console monitor, such ...
ORGAN MOTION AND IMAGE GUIDANCE IN RADIATION THERAPY
... Organ motion and inaccurate patient positioning may compromise radiation therapy outcome. With the aid of image guidance, it is possible to allow for a more accurate organ motion and motion control study, which could lead to the reduction of irradiated healthy tissues and possible dose escalation to ...
... Organ motion and inaccurate patient positioning may compromise radiation therapy outcome. With the aid of image guidance, it is possible to allow for a more accurate organ motion and motion control study, which could lead to the reduction of irradiated healthy tissues and possible dose escalation to ...
IAEA Training Material on Radiation Protection in - RPOP
... practice in 1972 and revolutionized X ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are therefore not superimposed on the image as they are in conventional projections • The technique offered in particular improved low contrast resolut ...
... practice in 1972 and revolutionized X ray imaging by providing high quality images which reproduced transverse cross sections of the body. • Tissues are therefore not superimposed on the image as they are in conventional projections • The technique offered in particular improved low contrast resolut ...
Tomotherapy vs IMRT (952kB PPT)
... The ring gantry of a Tomotherapy unit exploits this (ring) structural stability resulting in an isocentric precision of 0.2 mm, 5x better than typical arm-gantry systems. ...
... The ring gantry of a Tomotherapy unit exploits this (ring) structural stability resulting in an isocentric precision of 0.2 mm, 5x better than typical arm-gantry systems. ...
Digital chest radiography
... collimation. No increased dose was found for the other organs, which may relay of the position of the TLD tablets that already where very close to the collimation border at correct collimation. We found that DAP values increased with 54% (p>0.01) from correct to 10.2 cm excessive collimation. Conclu ...
... collimation. No increased dose was found for the other organs, which may relay of the position of the TLD tablets that already where very close to the collimation border at correct collimation. We found that DAP values increased with 54% (p>0.01) from correct to 10.2 cm excessive collimation. Conclu ...
dual energy computed tomography for proton therapy treatment
... because their uncertainties were different under each condition. An estimate of the composite range uncertainty (2σ) was determined for three tumor sites – prostate, lung, and head-and-neck, by combining the uncertainty estimates of all three tissue groups, weighted by their proportions along typica ...
... because their uncertainties were different under each condition. An estimate of the composite range uncertainty (2σ) was determined for three tumor sites – prostate, lung, and head-and-neck, by combining the uncertainty estimates of all three tissue groups, weighted by their proportions along typica ...
X-ray Tube and Generator
... this could be responsible for up to 700 cancer deaths/year ! Safety in Diagnostic ...
... this could be responsible for up to 700 cancer deaths/year ! Safety in Diagnostic ...
Study on the Computed Tomography Dose Index volume
... Majority examinations of multi slice CT scan are performed in helical mode and issues regarding dose still an area of some debate on these system especially for those who had repeated CT examinations since the effective dose from CT scan on average is ~10 mSv [1]. Therefore, once a CT examination is ...
... Majority examinations of multi slice CT scan are performed in helical mode and issues regarding dose still an area of some debate on these system especially for those who had repeated CT examinations since the effective dose from CT scan on average is ~10 mSv [1]. Therefore, once a CT examination is ...
Article in PDF
... therefore to differentiate recurrent tumor from a treatmentrelated changes, we often depend on the clinical course, a brain biopsy, or imaging follow-up over a period of time but not the specific imaging itself [7-10]. Magnetic resonance spectroscopy (MRS), an advanced MRI technique, a noninvasive t ...
... therefore to differentiate recurrent tumor from a treatmentrelated changes, we often depend on the clinical course, a brain biopsy, or imaging follow-up over a period of time but not the specific imaging itself [7-10]. Magnetic resonance spectroscopy (MRS), an advanced MRI technique, a noninvasive t ...
Image Guided Patient Setup
... in reducing treatment margins should focus on this component. The latter is the basis for the so-called offline approach. This approach, however, should not be generalized as the example of obese patients clearly illustrates that the random component can be more prominent than the systematic compone ...
... in reducing treatment margins should focus on this component. The latter is the basis for the so-called offline approach. This approach, however, should not be generalized as the example of obese patients clearly illustrates that the random component can be more prominent than the systematic compone ...
Integrated FDG-PET and PET/CT: Clinical Applications
... Therapy-related Therapy-related: Ostomies, drainage tubes, stents (percutaneous more common), radiation therapy , chemotherapy Trauma Infection Abscesses, Acute cholecystitis, Acute cholangitis, Acute pancreatitis (chronic pancreatitis but uncommon), Inflammatory bowel disease, Diverticuli ...
... Therapy-related Therapy-related: Ostomies, drainage tubes, stents (percutaneous more common), radiation therapy , chemotherapy Trauma Infection Abscesses, Acute cholecystitis, Acute cholangitis, Acute pancreatitis (chronic pancreatitis but uncommon), Inflammatory bowel disease, Diverticuli ...
academic program for master of science degree in medical
... The material in this section is designed to teach a graduate in physics (or engineering, with strong physics and math) the basics of radiological physics and dosimetry. Quantities and units are introduced early so that radioactive decay and radiation interactions can then be discussed, with emphasis ...
... The material in this section is designed to teach a graduate in physics (or engineering, with strong physics and math) the basics of radiological physics and dosimetry. Quantities and units are introduced early so that radioactive decay and radiation interactions can then be discussed, with emphasis ...
Quality Assurance (QA) for Kilovoltage Cone Beam
... Fig. 8. Two Ball Phantom, top: kV CBCT image of the plastic ball in three views, bottom: MV port film image of the Tungsten ball (Varian OBI). 2.3 Registration and correction accuracy In addition to checking the accuracy of the isocenter of the imaging system, it needs to be verified that the system ...
... Fig. 8. Two Ball Phantom, top: kV CBCT image of the plastic ball in three views, bottom: MV port film image of the Tungsten ball (Varian OBI). 2.3 Registration and correction accuracy In addition to checking the accuracy of the isocenter of the imaging system, it needs to be verified that the system ...
01 - Use of a dDVH decomposition technique to evaluate
... Earlier this year a commercial system for delivering intensity modulated radiation therapy using a helical, rotational delivery (TomoTherapy, TomoTherapy inc., Madison US) was installed at the AZVUB. The system consists of a 6MV linac mounted on a slipring, and the center of rotation is located at a ...
... Earlier this year a commercial system for delivering intensity modulated radiation therapy using a helical, rotational delivery (TomoTherapy, TomoTherapy inc., Madison US) was installed at the AZVUB. The system consists of a 6MV linac mounted on a slipring, and the center of rotation is located at a ...
Dose reduction in maxillofacial imaging using low dose
... because these areas are directly irradiated by the X-ray beam. The findings resulting from the study are in agreement with other investigations, which have identified the highest absorbed radiation doses in these areas [10,15,22,24]. Contrary, the thyroid gland and the eyes received the lowest radia ...
... because these areas are directly irradiated by the X-ray beam. The findings resulting from the study are in agreement with other investigations, which have identified the highest absorbed radiation doses in these areas [10,15,22,24]. Contrary, the thyroid gland and the eyes received the lowest radia ...
Correlation of clinical and MRI staging in cervical carcinoma treated
... III disease is approximately two times higher than in stage IIB (13, 14). These data indicate the importance of stage IIIB diagnosis in helping to determine prognosis prior to treatment. MRI findings that are suggestive of pelvic sidewall involvement have been defined (8, 15). Although there is incr ...
... III disease is approximately two times higher than in stage IIB (13, 14). These data indicate the importance of stage IIIB diagnosis in helping to determine prognosis prior to treatment. MRI findings that are suggestive of pelvic sidewall involvement have been defined (8, 15). Although there is incr ...
Cone Beam Computed Tomography in Endodontics: An Overview.
... drawback has been be overcome by Cone Beam Computed Tomography (CBCT). CBCT is a medical imaging technique consisting of X-ray based computed tomography where the X-rays are divergent forming a cone. It has the ability to eliminate superimposition of structures that normally overlap in the commonly ...
... drawback has been be overcome by Cone Beam Computed Tomography (CBCT). CBCT is a medical imaging technique consisting of X-ray based computed tomography where the X-rays are divergent forming a cone. It has the ability to eliminate superimposition of structures that normally overlap in the commonly ...
AAPM REPORT NO. 54 STEREOTACTIC RADIOSURGERY Report
... This report describes the techniques for stereotactic external beam irradiation with heavy charged particles from cyclotrons, x rays from electron linear accelerators (Linacs) with nominal beam energies between 4- and 18MV, and gamma rays from the "gamma knife" using 201 _Co sources. The first three ...
... This report describes the techniques for stereotactic external beam irradiation with heavy charged particles from cyclotrons, x rays from electron linear accelerators (Linacs) with nominal beam energies between 4- and 18MV, and gamma rays from the "gamma knife" using 201 _Co sources. The first three ...
Chapter 15 SPECIAL PROCEDURES AND TECHNIQUES IN
... Department of Medical Physics, McGill University Health Centre, Montreal, Quebec, Canada M.B. PODGORSAK Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York, United States of America ...
... Department of Medical Physics, McGill University Health Centre, Montreal, Quebec, Canada M.B. PODGORSAK Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York, United States of America ...
Mammography
... Anode Targets used in combination with specific tube filters to achieve optimal energy spectra ...
... Anode Targets used in combination with specific tube filters to achieve optimal energy spectra ...
Chapter 5 X-ray imaging 5.1 The physics of diagnostic X-rays
... as it moves so the X-ray beam is always directed at the centre of the ring. The detector signals are simultaneously recorded by the computer each time the X-ray tube moves round the ring through a fraction of a degree until the tube has moved through 180°. In this way, the computer collects sufficie ...
... as it moves so the X-ray beam is always directed at the centre of the ring. The detector signals are simultaneously recorded by the computer each time the X-ray tube moves round the ring through a fraction of a degree until the tube has moved through 180°. In this way, the computer collects sufficie ...
Development of a Whole Body Atlas for Radiation Sharif Qatarneh
... For this quest for knowledge, the principal objective of this thesis is at first to develop and construct an efficient knowledgebase in the form of a whole body Atlas database, which contains a reference anatomical geometry of standardized segmented organs, such as the lymph node topography, that ar ...
... For this quest for knowledge, the principal objective of this thesis is at first to develop and construct an efficient knowledgebase in the form of a whole body Atlas database, which contains a reference anatomical geometry of standardized segmented organs, such as the lymph node topography, that ar ...
3D Dosimetry of the Amersham 6711 and AgX100 Iodine
... A. Thomas , J. Newton , M. Oldham. “A method to correct for stray light in telecentric optical‐CT imaging of radiochromic dosimeters”. (accessed Aug 2012) M. Oldham. “3D Dosimetry, and Clinically Meaningful QA” presentation. (accessed Aug 2012) R Popert, P Acher, N Nichol, S Morris, Ron Beaney. “B ...
... A. Thomas , J. Newton , M. Oldham. “A method to correct for stray light in telecentric optical‐CT imaging of radiochromic dosimeters”. (accessed Aug 2012) M. Oldham. “3D Dosimetry, and Clinically Meaningful QA” presentation. (accessed Aug 2012) R Popert, P Acher, N Nichol, S Morris, Ron Beaney. “B ...
Proton therapy
Proton therapy or proton beam therapy is a medical procedure, a type of particle therapy that uses a beam of protons to irradiate diseased tissue, most often in the treatment of cancer. Proton therapy's chief advantage over other types of external beam radiotherapy is that as a charged particle the dose is deposited over a narrow range and there is minimal exit dose.