Cont…
... The body is mainly composed of water molecules which each contain two hydrogen nuclei or protons. When a person goes inside the powerful magnetic field of the scanner, these protons align with the direction of the field. A second radio frequency electromagnetic field is then briefly turned on causi ...
... The body is mainly composed of water molecules which each contain two hydrogen nuclei or protons. When a person goes inside the powerful magnetic field of the scanner, these protons align with the direction of the field. A second radio frequency electromagnetic field is then briefly turned on causi ...
History of radiology
... Primary beam of X-rays traverse the patient. In the patient a part of X-rays is absorbed (photoeffect) and the attenuated beam continues to the detector and creates the image. Another part is scattered (Compton´s effect) The degree of absorption depends on the wavelength and on the effective atomic ...
... Primary beam of X-rays traverse the patient. In the patient a part of X-rays is absorbed (photoeffect) and the attenuated beam continues to the detector and creates the image. Another part is scattered (Compton´s effect) The degree of absorption depends on the wavelength and on the effective atomic ...
lung cancer imaging in 2012 - Journal of the Belgian Society of
... CT compared to the arm-control group screened by chest radiograph (19). However, we need to be very cautious before spreading screening in the public policy recommendations. We need to rigorously analyse the cost-effectiveness of low-dose CT screening and the consequences of additional radiationand ...
... CT compared to the arm-control group screened by chest radiograph (19). However, we need to be very cautious before spreading screening in the public policy recommendations. We need to rigorously analyse the cost-effectiveness of low-dose CT screening and the consequences of additional radiationand ...
ARRT Competency Requirements
... must meet the following criteria: (a) the student is required to competently demonstrate skills as similar as circumstances permit to the cognitive, psychomotor, and affective skills required in the clinical setting; (b) the program director is confident that the skills required to competently perfo ...
... must meet the following criteria: (a) the student is required to competently demonstrate skills as similar as circumstances permit to the cognitive, psychomotor, and affective skills required in the clinical setting; (b) the program director is confident that the skills required to competently perfo ...
Document
... Using this method essentially eliminated variability in the CF due to background effects. The data demonstrated that the source should be large compared to the system resolution and collimator hole size. For such a source the position in the front of the camera did not affect the CF. Further, the di ...
... Using this method essentially eliminated variability in the CF due to background effects. The data demonstrated that the source should be large compared to the system resolution and collimator hole size. For such a source the position in the front of the camera did not affect the CF. Further, the di ...
ESTRO Vision 2020 - European CanCer Organisation
... Patient selection for accelerated partial-breast irradiation (APBI) after breast-conserving surgery: Recommendations of the Groupe Européen de Curiethérapie-European Society for Therapeutic Radiology and Oncology (GEC-ESTRO) breast cancer working group based on clinical evidence (2009) ...
... Patient selection for accelerated partial-breast irradiation (APBI) after breast-conserving surgery: Recommendations of the Groupe Européen de Curiethérapie-European Society for Therapeutic Radiology and Oncology (GEC-ESTRO) breast cancer working group based on clinical evidence (2009) ...
The Advanced Modalities ~ Computed
... a specific tissue. • Helical (spiral): The gantry rotates 360 degrees around the patient as the table moves through it continuously, rather than taking one slice at a time. • Multidetector CT: A scanner that has more than one detector (up to 64) and thus can obtain more than one image (or slice) at ...
... a specific tissue. • Helical (spiral): The gantry rotates 360 degrees around the patient as the table moves through it continuously, rather than taking one slice at a time. • Multidetector CT: A scanner that has more than one detector (up to 64) and thus can obtain more than one image (or slice) at ...
BASE OF TONGUE CANCER
... with a pencil beam dose calculation algorithm. The IMRT treatment plans were calculated with heterogeneity correction turned on during both beamlet optimization and final dose calculation. The exact planning parameters used for this case are given in Table 18.4-1. As previously mentioned in the targe ...
... with a pencil beam dose calculation algorithm. The IMRT treatment plans were calculated with heterogeneity correction turned on during both beamlet optimization and final dose calculation. The exact planning parameters used for this case are given in Table 18.4-1. As previously mentioned in the targe ...
Practice Standards - Ghana Society for Medical Physics
... 3.2 Radiation includes both ionizing and non-ionizing radiation such as electromagnetic radiation, particulate radiation, and ultrasound. These modalities, used for diagnostic or therapeutic purposes when prescribed by a properly qualified practitioner, are herein described as radiological procedure ...
... 3.2 Radiation includes both ionizing and non-ionizing radiation such as electromagnetic radiation, particulate radiation, and ultrasound. These modalities, used for diagnostic or therapeutic purposes when prescribed by a properly qualified practitioner, are herein described as radiological procedure ...
The Role of MRI in Radiation Treatment Planning
... So, why has MRI not replaced CT as the imaging of choice in radiation treatment planning? ...
... So, why has MRI not replaced CT as the imaging of choice in radiation treatment planning? ...
the First Positron Emission tomography–Magnetic Resonance
... oncology and neurological imaging. Some of these are still in the research phase, but the results can potentially change current clinical management. ...
... oncology and neurological imaging. Some of these are still in the research phase, but the results can potentially change current clinical management. ...
MRI Appearance Of Treated Liver Lesions
... been shown to indicate persistent tumor viability [7, 8]. In an attempt to estimate tumor necrosis on contrast-enhanced CT, a prior study suggested that tumor necrosis after TACE can be estimated by adding the nonenhancing areas on CT to the areas of lipiodol retention [4]. However, lipiodol distrib ...
... been shown to indicate persistent tumor viability [7, 8]. In an attempt to estimate tumor necrosis on contrast-enhanced CT, a prior study suggested that tumor necrosis after TACE can be estimated by adding the nonenhancing areas on CT to the areas of lipiodol retention [4]. However, lipiodol distrib ...
Fast brain spectroscopic imaging fits routine clinical use
... sugar, osmolite , present near cell damage, so in tumor, MS, hepatic encephalopathy ...
... sugar, osmolite , present near cell damage, so in tumor, MS, hepatic encephalopathy ...
Emergency Department Triage and Evaluation of the Patient
... ECG variables that identifies patients at such low risk for AMI/complications that they can be safely released from the ED No single test sufficiently excludes risk of AMI or complications Attempts to shorten evaluation ...
... ECG variables that identifies patients at such low risk for AMI/complications that they can be safely released from the ED No single test sufficiently excludes risk of AMI or complications Attempts to shorten evaluation ...
Type 1
... • The exact pre-operative diagnosis of Warthin’s tumor remains a major challenge, it allows patients to avoid a total parotidectomy. • The purpose of our work is to illustrate the imaging features of this tumor. ...
... • The exact pre-operative diagnosis of Warthin’s tumor remains a major challenge, it allows patients to avoid a total parotidectomy. • The purpose of our work is to illustrate the imaging features of this tumor. ...
ABR 2011 Update
... • The 80 hours must contain content applicable • To the subject areas described in the regulations • To the use of Sodium I-131 • Low Dose Therapy • High Dose Therapy • The "classroom and laboratory training" can be fulfilled in settings other than the traditional classroom setting • Hands-on experi ...
... • The 80 hours must contain content applicable • To the subject areas described in the regulations • To the use of Sodium I-131 • Low Dose Therapy • High Dose Therapy • The "classroom and laboratory training" can be fulfilled in settings other than the traditional classroom setting • Hands-on experi ...
CAD and comorbidities 563 P3096 | BEDSIDE
... X.H. Xu, W.J. Zhang, Y.J. Zhou, Y. Zhao, Z.M. Zhou, H.Y. Ma. Beijing Anzhen Hosp. of the Capital Univ. of Medical Sciences, Beijing Heart, Lung & Blood Vessel, Beijing, China, People’s Republic of Objective: To evaluate the effect of trimetazidine (TMZ) on recurrent angina and left ventricular funct ...
... X.H. Xu, W.J. Zhang, Y.J. Zhou, Y. Zhao, Z.M. Zhou, H.Y. Ma. Beijing Anzhen Hosp. of the Capital Univ. of Medical Sciences, Beijing Heart, Lung & Blood Vessel, Beijing, China, People’s Republic of Objective: To evaluate the effect of trimetazidine (TMZ) on recurrent angina and left ventricular funct ...
Radiation Safety in Pediatric Imaging - RPOP
... relative to adults • Children have more years ahead in which cancerous changes might occur • Girls are more at risk than boys • Radiologist tend to demand less noisy image in small patients • Small children have less adipose tissue ...
... relative to adults • Children have more years ahead in which cancerous changes might occur • Girls are more at risk than boys • Radiologist tend to demand less noisy image in small patients • Small children have less adipose tissue ...
03 Fluoroscopy Dosimetry KAP CM
... • Upper GI series, Barium Swallow • Lower GI series Barium Enema ...
... • Upper GI series, Barium Swallow • Lower GI series Barium Enema ...
03 Fluoroscopy Dosimetry KAP CM
... • Upper GI series, Barium Swallow • Lower GI series Barium Enema ...
... • Upper GI series, Barium Swallow • Lower GI series Barium Enema ...
Chapter 20 - RadTherapy
... • A collimated x-ray beam is directed at the patient, and the attenuated beam is measured by a detector whose response is transmitted to a computer. • The computer analyzes the signal from the detector, reconstructs the image and then stores and/or displays the image. • Components of a CT simulator ...
... • A collimated x-ray beam is directed at the patient, and the attenuated beam is measured by a detector whose response is transmitted to a computer. • The computer analyzes the signal from the detector, reconstructs the image and then stores and/or displays the image. • Components of a CT simulator ...
EE-40: Prediction of Glioma Grade Based on
... grade pre-operatively but has its limitations. - The development of iCEUS as a modality may offer an additional and potentially more accurate way to evaluate glioma grade prior to resection. - iCEUS has many other potential advantages which may further help in the diagnosis and treatment of these de ...
... grade pre-operatively but has its limitations. - The development of iCEUS as a modality may offer an additional and potentially more accurate way to evaluate glioma grade prior to resection. - iCEUS has many other potential advantages which may further help in the diagnosis and treatment of these de ...
IGRT in CMUH
... • Dose volume constraints : typically same as conventional IMRT planning – For all target and normal tissue structures ...
... • Dose volume constraints : typically same as conventional IMRT planning – For all target and normal tissue structures ...
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.