Diffusion-weighted MR Imaging Offers No Advantage over Routine
... We chose to image our patients using a b value of 165 s/mm2 because it results in optimal signalto-noise ratio within a clinically acceptable time frame (4). This is important because, in many patients with metastases to the spine, the entire spine needs to be imaged, leading to a lengthy examinatio ...
... We chose to image our patients using a b value of 165 s/mm2 because it results in optimal signalto-noise ratio within a clinically acceptable time frame (4). This is important because, in many patients with metastases to the spine, the entire spine needs to be imaged, leading to a lengthy examinatio ...
Imaging of Perineural Tumor Spread in Head and Neck Cancer
... Generally related to parotid pathology, either primary parotid malignancy, or lesions, generally skin cancers, that secondarily invade the parotid, at diagnosis or at recurrence Less commonly, skin cancers that have not yet invaded the parotid Beware the subdermal skin cancer, that is difficul ...
... Generally related to parotid pathology, either primary parotid malignancy, or lesions, generally skin cancers, that secondarily invade the parotid, at diagnosis or at recurrence Less commonly, skin cancers that have not yet invaded the parotid Beware the subdermal skin cancer, that is difficul ...
Role of Multiplanar Reconstruction Imaging and Three
... Introduction: Skull fractures can occur in road traffic accidents, assaults, sports, and any other injuries. Fractures to the skull can occur in any region of the skull. The role of plain radiographs in assessing facial traumas has declined over the years. The use of multiplanar reconstruction (MPR) ...
... Introduction: Skull fractures can occur in road traffic accidents, assaults, sports, and any other injuries. Fractures to the skull can occur in any region of the skull. The role of plain radiographs in assessing facial traumas has declined over the years. The use of multiplanar reconstruction (MPR) ...
Diagnostic Accuracy of Multidetector Computed Tomography
... MDCT and ICA and complications were assessed in both groups. Bed-lying time for ICA included time for patient preparation and time for the invasive procedure. The study was approved by our institution’s scientific and ethical committees, and all participating patients gave written informed consent. ...
... MDCT and ICA and complications were assessed in both groups. Bed-lying time for ICA included time for patient preparation and time for the invasive procedure. The study was approved by our institution’s scientific and ethical committees, and all participating patients gave written informed consent. ...
Diagnostic Value of Only F-fluorodeocyglucose Positron Emission
... is one of the most important prognostic factors in head and neck squamous cell carcinoma (HNSCC).1,2 Therefore, accurate pretreatment staging at the time of diagnosis is critical when selecting an appropriate treatment strategy.3 Assessing cervical LN metastases is extremely difficult clinically. Co ...
... is one of the most important prognostic factors in head and neck squamous cell carcinoma (HNSCC).1,2 Therefore, accurate pretreatment staging at the time of diagnosis is critical when selecting an appropriate treatment strategy.3 Assessing cervical LN metastases is extremely difficult clinically. Co ...
Use of CBCT in the diagnosis of cervical spine spondylosis
... The fields-of-view (H x D) of the unit are 60 x 60 mm, 75 x 100 mm, 75 x145 mm and 130 x145 mm, and they are selectable according to the diagnostic task at hand. SCANORA 3D provides a seated patient platform and the region of interest can be freely located in the head and neck area thanks to motoriz ...
... The fields-of-view (H x D) of the unit are 60 x 60 mm, 75 x 100 mm, 75 x145 mm and 130 x145 mm, and they are selectable according to the diagnostic task at hand. SCANORA 3D provides a seated patient platform and the region of interest can be freely located in the head and neck area thanks to motoriz ...
A review of the dedicated studies to breast cancer diagnosis by
... Introduction: Body temperature is a natural criteria for the diagnosis of diseases. Thermal imaging (thermography) applies infrared method which is fast, non-invasive, non-contact and flexibile to monitor the temperature of the human body. Materials and methods: This paper investigates highly divers ...
... Introduction: Body temperature is a natural criteria for the diagnosis of diseases. Thermal imaging (thermography) applies infrared method which is fast, non-invasive, non-contact and flexibile to monitor the temperature of the human body. Materials and methods: This paper investigates highly divers ...
Complementary Roles: SR and CDA
... – Includes measurements, procedure logs, CAD results, etc., created in the imaging context, and together with images are interpreted by a radiologist to produce a report – The radiologist may quote or copy parts of Evidence Documents into the report, but doing so is part of the interpretation proces ...
... – Includes measurements, procedure logs, CAD results, etc., created in the imaging context, and together with images are interpreted by a radiologist to produce a report – The radiologist may quote or copy parts of Evidence Documents into the report, but doing so is part of the interpretation proces ...
Effects of 8 weeks of continuous positive obstructive sleep apnoea
... patients with BMI .35 kg?m-2 was solely because such individuals cannot usually fit into a magnetic resonance imaging (MRI) scanner. Patients who consumed .140 mg of alcohol per week and those with known liver disease were also excluded. Other selection criteria are available from the Australian and ...
... patients with BMI .35 kg?m-2 was solely because such individuals cannot usually fit into a magnetic resonance imaging (MRI) scanner. Patients who consumed .140 mg of alcohol per week and those with known liver disease were also excluded. Other selection criteria are available from the Australian and ...
Radiation exposure and thyroid cancer: a review
... documented, and the two main risk factors for the development of a thyroid cancer are the radiation dose delivered to the thyroid gland and the age at exposure. The risk increases after exposure to a mean dose of more than 0.05-0.1 Gy (50-100mGy). The risk is more important during childhood and decr ...
... documented, and the two main risk factors for the development of a thyroid cancer are the radiation dose delivered to the thyroid gland and the age at exposure. The risk increases after exposure to a mean dose of more than 0.05-0.1 Gy (50-100mGy). The risk is more important during childhood and decr ...
For internal use only
... SonoVue®, a first one for characterization of the detected focal lesion and another one for detection of additional lesions. Contrast-enhanced sequences were obtained using dedicated low-MI contrast-imaging software (MI < 0.2). Standard pre-settings were used, with the possibility to adjust settings ...
... SonoVue®, a first one for characterization of the detected focal lesion and another one for detection of additional lesions. Contrast-enhanced sequences were obtained using dedicated low-MI contrast-imaging software (MI < 0.2). Standard pre-settings were used, with the possibility to adjust settings ...
Multi-slice CT
... No longer essentially parallel Leads to Cone Angle Artifact Significant for 16, 32, 64 … data channels Requires use of special reconstruction algorithms to compensate ...
... No longer essentially parallel Leads to Cone Angle Artifact Significant for 16, 32, 64 … data channels Requires use of special reconstruction algorithms to compensate ...
The possibilities of reducing radiation dose and improve image
... Radiation Protection (ICRP) states that for doses of 100 mSv and higher, there is epidemiologic proven risk for radiation related cancer induction, and that there is no rational for assuming a low-dose threshold for cancer induction. In radiation protection management, it is therefore a general assu ...
... Radiation Protection (ICRP) states that for doses of 100 mSv and higher, there is epidemiologic proven risk for radiation related cancer induction, and that there is no rational for assuming a low-dose threshold for cancer induction. In radiation protection management, it is therefore a general assu ...
Ultra-Fast Digital Tomosynthesis Reconstruction Using General
... image reconstruction due to less projections data ( 4 times) (36), and 4) limited scan angle allows more flexibility in scanning geometries and patient set-ups (46). In addition to these advantages, and despite the reduced image quality and resolution, numerous publications have shown that DTS cont ...
... image reconstruction due to less projections data ( 4 times) (36), and 4) limited scan angle allows more flexibility in scanning geometries and patient set-ups (46). In addition to these advantages, and despite the reduced image quality and resolution, numerous publications have shown that DTS cont ...
Multiparametric Magnetic Resonance Imaging for Predicting
... dimension of the tumor measured on the surgical specimen and the longest dimension measured on the DCE-MRI data just before surgery as reported previously.38 The DWI data were rigidly registered43 to the DCE-MRI data, and the tumor ROIs as defined on the DCE-MRI data were then copied to the register ...
... dimension of the tumor measured on the surgical specimen and the longest dimension measured on the DCE-MRI data just before surgery as reported previously.38 The DWI data were rigidly registered43 to the DCE-MRI data, and the tumor ROIs as defined on the DCE-MRI data were then copied to the register ...
study of clinical and imaging profile in thyrotoxicosis
... thyrotoxicosis. Although a TSH assessment alone may be appropriate for routine screening in an asymptomatic patient, the suspicion of thyrotoxicosis warrants the additional assessment of T4 and T3. In cases in which subclinical hyperthyroidism is suspected, TSH measurement may be used as a first dia ...
... thyrotoxicosis. Although a TSH assessment alone may be appropriate for routine screening in an asymptomatic patient, the suspicion of thyrotoxicosis warrants the additional assessment of T4 and T3. In cases in which subclinical hyperthyroidism is suspected, TSH measurement may be used as a first dia ...
Assessment of left ventricular ejection fraction in patients - VU-dare
... Patients referred to the VU University Medical Center for CRT and/or ICD implantation for primary prevention according to current guidelines and who underwent both 2D echocardiographic and CMR evaluation within 3 months prior to implantation were included. A total of 152 patients with chronic stable ...
... Patients referred to the VU University Medical Center for CRT and/or ICD implantation for primary prevention according to current guidelines and who underwent both 2D echocardiographic and CMR evaluation within 3 months prior to implantation were included. A total of 152 patients with chronic stable ...
The Modern Technology of Radiation Oncology, Vol. 1
... is required to localize the tumor, to generate ionizing radiation, and to deliver a high radiation dose to a three-dimensional target volume while sparing normal tissues. A number of books have been written about the medical physics and clinical aspects of radiation oncology and treatment planning. ...
... is required to localize the tumor, to generate ionizing radiation, and to deliver a high radiation dose to a three-dimensional target volume while sparing normal tissues. A number of books have been written about the medical physics and clinical aspects of radiation oncology and treatment planning. ...
Including Anatomical and Functional Information in MC - DIE
... studies from subjects or phantoms has its benefits, MC simulation provides a flexible environment where the ground truth is known and where the realism of the input models and the equipment can be suitably reproduced. Hence, the number of scientific papers related to MC simulation has seen a conside ...
... studies from subjects or phantoms has its benefits, MC simulation provides a flexible environment where the ground truth is known and where the realism of the input models and the equipment can be suitably reproduced. Hence, the number of scientific papers related to MC simulation has seen a conside ...
x-ray safety manual - Winnipeg Regional Health Authority
... • Ensuring that an investigation is carried out in the event of any staff member receiving an actual or suspected radiation exposure exceeding any local investigation level. Guidance will be given by the Radiation Protection Department of CCMB. • Ensuring that any incident potentially requiring noti ...
... • Ensuring that an investigation is carried out in the event of any staff member receiving an actual or suspected radiation exposure exceeding any local investigation level. Guidance will be given by the Radiation Protection Department of CCMB. • Ensuring that any incident potentially requiring noti ...
PDF - Thieme Connect
... (KIS) for evaluation; excluded were patients whose weight exceeded by at least 50 kg the standard 70 kg patient weight according to EURATOM Patient Protection Directive, since such patients would negatively affect the mean value. For patients without weight data in the KIS, conclusions were drawn wi ...
... (KIS) for evaluation; excluded were patients whose weight exceeded by at least 50 kg the standard 70 kg patient weight according to EURATOM Patient Protection Directive, since such patients would negatively affect the mean value. For patients without weight data in the KIS, conclusions were drawn wi ...
ICRP Publication 105
... and physical considerations underlying the Recommendations were published as Annexes A and B of the actual Recommendations, we thought that this summary would fare better as a stand-alone document, particularly for those readers who are directly concerned with medical uses of radiation and want deta ...
... and physical considerations underlying the Recommendations were published as Annexes A and B of the actual Recommendations, we thought that this summary would fare better as a stand-alone document, particularly for those readers who are directly concerned with medical uses of radiation and want deta ...
ACR–SPR Practice Parameter for the Performance of Renal
... be as low as reasonably achievable for diagnostic image quality.1 Pediatric ad ministered activity ranges from 0.05 to 0.1 millicuries (1.85 to 3.7 MBq) per kilogram , with a minimum of 0.5 millicuries (18.5 MBq) and a maximum of 5.0 millicuries (185 MBq)2 [2]. 2. Glomerular radiopharmaceuticals: ma ...
... be as low as reasonably achievable for diagnostic image quality.1 Pediatric ad ministered activity ranges from 0.05 to 0.1 millicuries (1.85 to 3.7 MBq) per kilogram , with a minimum of 0.5 millicuries (18.5 MBq) and a maximum of 5.0 millicuries (185 MBq)2 [2]. 2. Glomerular radiopharmaceuticals: ma ...
Adaptive Iterative Reconstruction in CT: What Does It
... One might make different assumptions about scanner geometry, scanner optics, and noise statistics which are computationally more complex and combine these with multiple iterations of reconstruction — termed statistical iterative reconstruction. Such statistical iterative reconstruction may result in ...
... One might make different assumptions about scanner geometry, scanner optics, and noise statistics which are computationally more complex and combine these with multiple iterations of reconstruction — termed statistical iterative reconstruction. Such statistical iterative reconstruction may result in ...
RESEARCH ARTICLE Diffusion Weighted Imaging Can Distinguish
... mediastinal tumors was significantly lower than that (2.96±0.86 ×10-3mm2/sec) of benign mediastinal tumors and mass lesions (P<0.0001). Maximum standardized uptake value (SUVmax) (11.30±11.22) of malignant mediastinal tumors was significantly higher than that (2.53±3.92) of benign mediastinal tumors ...
... mediastinal tumors was significantly lower than that (2.96±0.86 ×10-3mm2/sec) of benign mediastinal tumors and mass lesions (P<0.0001). Maximum standardized uptake value (SUVmax) (11.30±11.22) of malignant mediastinal tumors was significantly higher than that (2.53±3.92) of benign mediastinal tumors ...
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.