Imaging in Radiotherapy, IAEA Consultant`s meeting report
... the accuracy of its spatial resolution. In the context of cancer, this is highly relevant when considering the desire to treat not only the gross tumor volume (GTV) but also deliver a dose to the surrounding clinical target volume (CTV), which may contain microscopic extension of the disease and is ...
... the accuracy of its spatial resolution. In the context of cancer, this is highly relevant when considering the desire to treat not only the gross tumor volume (GTV) but also deliver a dose to the surrounding clinical target volume (CTV), which may contain microscopic extension of the disease and is ...
Has Transit Dosimetry Come Of Age
... ...during the last few years rather intensive efforts have led to the development of techniques that produce images using high-energy high X- rays directly. As a result, electronic portal imaging devices (EPIDs) are becoming available to cancer radiotherapy. In some systems, a small fraction of the ...
... ...during the last few years rather intensive efforts have led to the development of techniques that produce images using high-energy high X- rays directly. As a result, electronic portal imaging devices (EPIDs) are becoming available to cancer radiotherapy. In some systems, a small fraction of the ...
Web-based system for Quality Assurance of Radiation Oncology
... I would like to start by thanking my supervisor Dr. François DeBlois for his invaluable support throughout my thesis. His guidance and encouragement at all stages of this project made it a wonderful experience. I would like to acknowledge Dr. Gabriela Stroian for the many hours spent carefully discu ...
... I would like to start by thanking my supervisor Dr. François DeBlois for his invaluable support throughout my thesis. His guidance and encouragement at all stages of this project made it a wonderful experience. I would like to acknowledge Dr. Gabriela Stroian for the many hours spent carefully discu ...
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 ...
Accounting for Imaging Dose: Impact of California Regulation
... • Annual verification of the CT dose displayed by scanner Section 2 (effective July 1, 2013) Mandatory CT accreditation Section 3 (effective Jan 1, 2011, SB 38 July 1, 2012) • Report CT over-exposures exceeding certain dose limits • Report CT or RT over-doses to fetus or incorrect site, etc ...
... • Annual verification of the CT dose displayed by scanner Section 2 (effective July 1, 2013) Mandatory CT accreditation Section 3 (effective Jan 1, 2011, SB 38 July 1, 2012) • Report CT over-exposures exceeding certain dose limits • Report CT or RT over-doses to fetus or incorrect site, etc ...
Dynamic contrast-enhanced MRI for prostate cancer localization
... ABSTRACT. Radiotherapy dose escalation improves tumour control in prostate cancer but with increased toxicity. Boosting focal tumour only may allow dose escalation with acceptable toxicity. Intensity-modulated radiotherapy can deliver this, but visualization of the tumour remains limiting. CT or con ...
... ABSTRACT. Radiotherapy dose escalation improves tumour control in prostate cancer but with increased toxicity. Boosting focal tumour only may allow dose escalation with acceptable toxicity. Intensity-modulated radiotherapy can deliver this, but visualization of the tumour remains limiting. CT or con ...
IAEA Training Material on Radiation Protection in - RPOP
... 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 resolution for better visualization of soft tissue, but with relatively high absorbed radiation dose ...
... 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 resolution for better visualization of soft tissue, but with relatively high absorbed radiation dose ...
Radiation risk from mammography - Hendrick
... previous risk estimates of radiationinduced cancer incidence and mortality, including the age dependence of both risks (12). In light of these new radiation risk estimates, it seems timely to re-evaluate and summarize radiation doses and the resultant cancer risks associated with all breast imaging ...
... previous risk estimates of radiationinduced cancer incidence and mortality, including the age dependence of both risks (12). In light of these new radiation risk estimates, it seems timely to re-evaluate and summarize radiation doses and the resultant cancer risks associated with all breast imaging ...
1. Project title Evaluation of Image Guided Radiotherapy (IGRT) for
... obtained. In a comparison of IGRT and bony anatomy set-up (standard imaging), additional radial safety margins of 4.5 - 5.5mm were needed when standard imaging was used [8]. Another study found the average set-up error to be on average 4mm (± 3mm) greater when using standard set-up compared to IGRT ...
... obtained. In a comparison of IGRT and bony anatomy set-up (standard imaging), additional radial safety margins of 4.5 - 5.5mm were needed when standard imaging was used [8]. Another study found the average set-up error to be on average 4mm (± 3mm) greater when using standard set-up compared to IGRT ...
design and implementation of an anthropomorphic quality
... (optimization) treatment-planning systems. Because IMRT offers the possibility of high dose gradients, it is possible to deliver high doses to target volumes while maintaining low doses to nearby critical normal structures to a much greater extent than is the case with conventional radiation therapy ...
... (optimization) treatment-planning systems. Because IMRT offers the possibility of high dose gradients, it is possible to deliver high doses to target volumes while maintaining low doses to nearby critical normal structures to a much greater extent than is the case with conventional radiation therapy ...
- BIR Publications
... ABSTRACT. Margins are used in radiotherapy to assist in the calculation of planning target volumes. These margins can be determined by analysing the geometric uncertainties inherent to the radiotherapy planning and delivery process. An important part of this process is the study of electronic portal ...
... ABSTRACT. Margins are used in radiotherapy to assist in the calculation of planning target volumes. These margins can be determined by analysing the geometric uncertainties inherent to the radiotherapy planning and delivery process. An important part of this process is the study of electronic portal ...
Image Guided Radiation Therapy: A Refresher
... i reduction d i for f most RT treatments. … facilitate implementation of new RT techniques (eg, (eg liver and lung SBRT) and in selected sites reduce toxicity and improve local control. The whole chain of interventions in the RT process should be prospectively assessed. This is particularly importan ...
... i reduction d i for f most RT treatments. … facilitate implementation of new RT techniques (eg, (eg liver and lung SBRT) and in selected sites reduce toxicity and improve local control. The whole chain of interventions in the RT process should be prospectively assessed. This is particularly importan ...
Special procedures and techniques in radiotherapy
... Bilateral Total Body Irradiation Sagittal laser or floor marks to define setup distance ...
... Bilateral Total Body Irradiation Sagittal laser or floor marks to define setup distance ...
position paper techniques and technologies in radiation oncology
... (radiation) is delivered using various specifically chosen techniques to deliver a prescribed radiation dose to the target (such as a tumour) while ensuring that the radiation dose to the surrounding normal tissues is as low as possible.[1] The overall optimal radiation therapy utilisation rate for ...
... (radiation) is delivered using various specifically chosen techniques to deliver a prescribed radiation dose to the target (such as a tumour) while ensuring that the radiation dose to the surrounding normal tissues is as low as possible.[1] The overall optimal radiation therapy utilisation rate for ...
Image-guided radiation therapy (IGRT): practical
... of bone structures. The estimated setup error is approximately equal to 3–5 mm using currently available masks. If the stereotactic frame is used, the estimated error is 1.3– ...
... of bone structures. The estimated setup error is approximately equal to 3–5 mm using currently available masks. If the stereotactic frame is used, the estimated error is 1.3– ...
Radiation Safety
... patient’s bodily fluids cannot become contaminated. Seeds may be implanted on a short-term or long-term basis. Feedback for C: Incorrect. The correct answer is A. In brachytherapy, the radiation source is sealed in a seed. For this reason, radiation cannot leak out of the patient, and the patient’s ...
... patient’s bodily fluids cannot become contaminated. Seeds may be implanted on a short-term or long-term basis. Feedback for C: Incorrect. The correct answer is A. In brachytherapy, the radiation source is sealed in a seed. For this reason, radiation cannot leak out of the patient, and the patient’s ...
Introducing Radiology Select: Radiation Dose and Dose Reduction
... As a consequence of the success of medical imaging over the past decades 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 subs ...
... As a consequence of the success of medical imaging over the past decades 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 subs ...
Mammography
... the AMA, ACS and ACR recommends a baseline mammogram by age 40, biannual examinations between ages 40 and 50, and yearly examinations after age 50 NCI recommends women in their 40s, 50s and older should be screened every one to two years with mammography requires craniocaudal (CC) and mediolat ...
... the AMA, ACS and ACR recommends a baseline mammogram by age 40, biannual examinations between ages 40 and 50, and yearly examinations after age 50 NCI recommends women in their 40s, 50s and older should be screened every one to two years with mammography requires craniocaudal (CC) and mediolat ...
Radiation Safety in the Cath Lab
... Vary tube angle if possible to change skin exposed Position table & image receptor: x-ray tube close to pt increases dose; high image receptor incr. scatter Keep pt & operator body parts out of field of view Maximize shielding and distance from x-ray source for all personnel Manage and monitor dose ...
... Vary tube angle if possible to change skin exposed Position table & image receptor: x-ray tube close to pt increases dose; high image receptor incr. scatter Keep pt & operator body parts out of field of view Maximize shielding and distance from x-ray source for all personnel Manage and monitor dose ...
Chapter 15 SPECIAL PROCEDURES AND TECHNIQUES IN
... Montreal, Quebec, Canada M.B. PODGORSAK Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York, United States of America ...
... Montreal, Quebec, Canada M.B. PODGORSAK Department of Radiation Medicine, Roswell Park Cancer Institute, Buffalo, New York, United States of America ...
9 Three-Dimensional Treatment Planning and Conformal Therapy
... apertures can be drawn using a computer mouse. Another powerful display feature in a 3D TPS is the room’s eye view (REV; Fig. 9.8), in which the planner can simulate any arbitrary viewing location within the treatment room (Purdy et al. 1987, 1993). The REV display complements the BEV in the beam de ...
... apertures can be drawn using a computer mouse. Another powerful display feature in a 3D TPS is the room’s eye view (REV; Fig. 9.8), in which the planner can simulate any arbitrary viewing location within the treatment room (Purdy et al. 1987, 1993). The REV display complements the BEV in the beam de ...
- Surrey Research Insight Open Access
... Whole breast radiotherapy (WBRT) following breast-conserving surgery (BCS) improves local control and survival (1, 2) but is associated with increased non-breast-cancer-related mortality and morbidity due to irradiation of non-target tissue (2, 3). A strategy that aims to improve therapeutic ratio i ...
... Whole breast radiotherapy (WBRT) following breast-conserving surgery (BCS) improves local control and survival (1, 2) but is associated with increased non-breast-cancer-related mortality and morbidity due to irradiation of non-target tissue (2, 3). A strategy that aims to improve therapeutic ratio i ...
Verification and correction of geometrical uncertainties in
... (DRR), image generated by treatment planning system from the CT data set is most often used for this purpose. Various algorithms have been developed to enable computerized comparison of images for detection of field placement errors. This is usually accomplished in several steps: 1. Information abou ...
... (DRR), image generated by treatment planning system from the CT data set is most often used for this purpose. Various algorithms have been developed to enable computerized comparison of images for detection of field placement errors. This is usually accomplished in several steps: 1. Information abou ...
ACR Practice Parameter for the Performance of Brain Stereotactic
... SRS has been applied to a number of benign and malignant intracranial conditions [3-12]. The delivery of a high dose of ionizing radiation that conforms to the shape of the target mandates an overall accuracy of approximately 1 mm [13]. Gamma ray photons, x-ray photons, protons, and heavy particles ...
... SRS has been applied to a number of benign and malignant intracranial conditions [3-12]. The delivery of a high dose of ionizing radiation that conforms to the shape of the target mandates an overall accuracy of approximately 1 mm [13]. Gamma ray photons, x-ray photons, protons, and heavy particles ...
PSEUDOANGIOMATOUS STROMAL HYPERPLASIA OF BREAST
... Keywords: Breast masses/Nodular tumour/Pseudoangiomatous stromal hyperplasia Aim: To present a case of pseudoangiomatous stromal hyperplasia (PASH) and its findings under 1. mammography – MG, 2. ultrasonography – USG and 3. magnetic resonance imaging – MRI. Materials and methods: A woman 39 years of ...
... Keywords: Breast masses/Nodular tumour/Pseudoangiomatous stromal hyperplasia Aim: To present a case of pseudoangiomatous stromal hyperplasia (PASH) and its findings under 1. mammography – MG, 2. ultrasonography – USG and 3. magnetic resonance imaging – MRI. Materials and methods: A woman 39 years of ...