Multislice HELICAL CT SCANNER
... clinicians to accurately diagnose disease at an early stage. With the corresponding increase in the number of CT scans, minimizing the dose in every examination becomes an even greater concern. The design choices made in Aquilion maximize dose efficiency, with tubes that reduce off-focal X-rays and ...
... clinicians to accurately diagnose disease at an early stage. With the corresponding increase in the number of CT scans, minimizing the dose in every examination becomes an even greater concern. The design choices made in Aquilion maximize dose efficiency, with tubes that reduce off-focal X-rays and ...
Imaging in Pregnant Patients
... provides minimal fetal radiation exposure but at the same time is able to accurately answer the clinical question. Table 3 presents a comparison of the guidelines proposed by the American Congress of Obstetricians and Gynecologists (ACOG) and those outlined by the ACR (10,14). There are situations w ...
... provides minimal fetal radiation exposure but at the same time is able to accurately answer the clinical question. Table 3 presents a comparison of the guidelines proposed by the American Congress of Obstetricians and Gynecologists (ACOG) and those outlined by the ACR (10,14). There are situations w ...
Wide field-of-view, twin-region two-photon imaging across extended
... In many conventional two-photon microscopes, the X and Y galvanometer scanners are placed close together. This arrangement is acceptable when scan angles are small, and simplifies the optical layout. However, when scan angles are large (e.g., to obtain a wide FOV; Fig. 1b) the deflection from the fi ...
... In many conventional two-photon microscopes, the X and Y galvanometer scanners are placed close together. This arrangement is acceptable when scan angles are small, and simplifies the optical layout. However, when scan angles are large (e.g., to obtain a wide FOV; Fig. 1b) the deflection from the fi ...
1 Comparison of Effective Dose and Lifetime Risk of Cancer
... Doses were significantly lower than the calculated doses from radiopharmaceutical administration (11 mSv and 14 mSv for 99m Tc-Tetrofosmin and 99m Tc-Sestamibi respectively). Overall lifetime biological risks were lower suggesting that using CTAC data posed minimal to the risk to the patient. Compar ...
... Doses were significantly lower than the calculated doses from radiopharmaceutical administration (11 mSv and 14 mSv for 99m Tc-Tetrofosmin and 99m Tc-Sestamibi respectively). Overall lifetime biological risks were lower suggesting that using CTAC data posed minimal to the risk to the patient. Compar ...
Review of SPECT Myocardial Perfusion Imaging
... viability will assist clinical management. With the Tc99m-based mitochondrial imaging agents, the primary options are using either a 1 or 2-day protocol. The 1-day protocol is primarily used, as it is more convenient for patients and more efficient. The 2-day protocol allows for higher administered ...
... viability will assist clinical management. With the Tc99m-based mitochondrial imaging agents, the primary options are using either a 1 or 2-day protocol. The 1-day protocol is primarily used, as it is more convenient for patients and more efficient. The 2-day protocol allows for higher administered ...
tijdschriftnuleairege neeskunde - Tijdschrift voor Nucleaire
... and SPECT/CT systems are available for routine clinical studies. This is the case not only for The Netherlands but also for Europe, USA and most developed countries. Also, recently PET/MRI systems as well hybrid tracers became available for clinical studies. In addition, in the field of preclinical ...
... and SPECT/CT systems are available for routine clinical studies. This is the case not only for The Netherlands but also for Europe, USA and most developed countries. Also, recently PET/MRI systems as well hybrid tracers became available for clinical studies. In addition, in the field of preclinical ...
Diagnostic imaging over the last 50 years
... management, and especially radiologic diagnosis. From the standpoint of viewing of clinical images, the major achievement in medical imaging might seem to lie in the production of many different types of images. However, modern medical imaging includes not only image production, but also image proce ...
... management, and especially radiologic diagnosis. From the standpoint of viewing of clinical images, the major achievement in medical imaging might seem to lie in the production of many different types of images. However, modern medical imaging includes not only image production, but also image proce ...
Standardization of Terminology and Reporting Criteria
... Required for all intermediate-term and long-term studies Survival calculated from start of ablation rather than start of treatment Also should be reported from the time of diagnosis Provide percentage survival at specified time points and mean/median survival times Time-to-progression and progression ...
... Required for all intermediate-term and long-term studies Survival calculated from start of ablation rather than start of treatment Also should be reported from the time of diagnosis Provide percentage survival at specified time points and mean/median survival times Time-to-progression and progression ...
Computed tomography in staging for lung cancer
... considering surgical planning of endobronchial tumours, multiplanar reconstructions often provide a better understanding of tumoural implantation compared with cross-sectional images and endoscopic examination [38]. The continuous technical improvement has allowed the development of other post-proce ...
... considering surgical planning of endobronchial tumours, multiplanar reconstructions often provide a better understanding of tumoural implantation compared with cross-sectional images and endoscopic examination [38]. The continuous technical improvement has allowed the development of other post-proce ...
Chapter 3
... The operating console performs two major functions – imaging control with pre-selected technique conditions and image viewing and manipulation (window/level) ...
... The operating console performs two major functions – imaging control with pre-selected technique conditions and image viewing and manipulation (window/level) ...
Introduction of Radiographic Technology
... Viewing from the same perspective as the x-ray tube Marked R/L by the side of the patient closet to the IR Viewing from the same perspective as the x-ray tube Crosswise and p’t upside on view box upside ...
... Viewing from the same perspective as the x-ray tube Marked R/L by the side of the patient closet to the IR Viewing from the same perspective as the x-ray tube Crosswise and p’t upside on view box upside ...
mri in radiation treatment planning and assessment
... TECHNIQUES AND APPLICATIONS III.1.5 Proton MR spectroscopy – Proton MR spectroscopy (MRS) is a technique that is able to detect proton metabolites and chemical compounds in tissue – In an organic compound, electron bindings of each of protons with neighbor atoms are different, and generate a slight ...
... TECHNIQUES AND APPLICATIONS III.1.5 Proton MR spectroscopy – Proton MR spectroscopy (MRS) is a technique that is able to detect proton metabolites and chemical compounds in tissue – In an organic compound, electron bindings of each of protons with neighbor atoms are different, and generate a slight ...
NYU`s Sports Medicine Imaging
... related injuries which is organized by body part and includes a review of relevant anatomy in each area. We will incorporate both anatomic dissections by respected members of the NYU orthopedic faculty as well as high level imaging performed on our state of the art facilities and described by the de ...
... related injuries which is organized by body part and includes a review of relevant anatomy in each area. We will incorporate both anatomic dissections by respected members of the NYU orthopedic faculty as well as high level imaging performed on our state of the art facilities and described by the de ...
(mIBG) Scintigraphy - Society of Nuclear Medicine
... The aim of this document is to provide general information about mIBG scintigraphy in cancer patients. This guideline describes the mIBG scintigraphy protocol currently used in the clinical routine, but does not include all existing procedures for neuroendocrine tumours. It should therefore not be t ...
... The aim of this document is to provide general information about mIBG scintigraphy in cancer patients. This guideline describes the mIBG scintigraphy protocol currently used in the clinical routine, but does not include all existing procedures for neuroendocrine tumours. It should therefore not be t ...
Evolution of CT scanners
... – Image noise is random fluctuations of pixels values – Finite number of x-ray photons are transmitted (i.e. in a slice) – Thinner slices Less x-ray photons larger variation in pixel values more noise – mA then has to be increased to provide useful diagnostic images – linear relationship betwe ...
... – Image noise is random fluctuations of pixels values – Finite number of x-ray photons are transmitted (i.e. in a slice) – Thinner slices Less x-ray photons larger variation in pixel values more noise – mA then has to be increased to provide useful diagnostic images – linear relationship betwe ...
CT Scanner Acceptance Testing
... secondly, to establish baseline values against which subsequent routine quality control results are to be compared. Although acceptance and commissioning tests are often performed together, two sets of phantoms and exposure parameters may need to be used, for the reasons given in section 2.1. ...
... secondly, to establish baseline values against which subsequent routine quality control results are to be compared. Although acceptance and commissioning tests are often performed together, two sets of phantoms and exposure parameters may need to be used, for the reasons given in section 2.1. ...
en_12-whole-body magnetic.p65
... Abstract Objective: To compare the performance of the T1, T2, STIR and DWIBS (diffusion-weighted whole-body imaging with background body signal suppression) sequences in the staging and follow-up of pediatric patients with Hodgkin’s lymphoma in lymph node chains, parenchymal organs and bone marrow, ...
... Abstract Objective: To compare the performance of the T1, T2, STIR and DWIBS (diffusion-weighted whole-body imaging with background body signal suppression) sequences in the staging and follow-up of pediatric patients with Hodgkin’s lymphoma in lymph node chains, parenchymal organs and bone marrow, ...
New frontiers in neuroimaging applications to inborn errors of
... nervous system resulting in chronic encephalopathy, though the etiopathophysiology of neurological injury have not been fully established in many disorders. Shared mechanisms can be envisioned such as oxidative injury due to over-activation of N-Methyl-D-Aspartate (NMDA) receptors with subsequent gl ...
... nervous system resulting in chronic encephalopathy, though the etiopathophysiology of neurological injury have not been fully established in many disorders. Shared mechanisms can be envisioned such as oxidative injury due to over-activation of N-Methyl-D-Aspartate (NMDA) receptors with subsequent gl ...
Molecular imaging agents for SPECT (and SPECT/CT)
... hold true with preclinical equipment where SPECT can achieve higher spatial resolution than PET. Moreover, SPECT allows simultaneous imaging of multiple tracers with different gamma energies, which is not possible with PET where all radionuclides are detected via 511 keV annihilation photons. Also, ...
... hold true with preclinical equipment where SPECT can achieve higher spatial resolution than PET. Moreover, SPECT allows simultaneous imaging of multiple tracers with different gamma energies, which is not possible with PET where all radionuclides are detected via 511 keV annihilation photons. Also, ...
Image Acquisition Site - QIBA Wiki
... response to treatments for a variety of medical conditions, including cancers in the lung (either primary cancers or cancers that metastasize to the lung [18]. Several studies at various scopes are now underway to provide comparison between the effectiveness of volumetry and uni-dimensional LDs as t ...
... response to treatments for a variety of medical conditions, including cancers in the lung (either primary cancers or cancers that metastasize to the lung [18]. Several studies at various scopes are now underway to provide comparison between the effectiveness of volumetry and uni-dimensional LDs as t ...
Fetal magnetic resonance imaging: jumping from 1.5 to 3 tesla
... the same signal strength is to be maintained, repetition time should be increased. However an increase in repetition time results in unwanted increased acquisition time and potentially worsening motion artifact of a highly mobile fetus. Our current 3-T protocols (Tables 1 and 2) reflect an increase ...
... the same signal strength is to be maintained, repetition time should be increased. However an increase in repetition time results in unwanted increased acquisition time and potentially worsening motion artifact of a highly mobile fetus. Our current 3-T protocols (Tables 1 and 2) reflect an increase ...
A prototype modular detector design for high
... Abstract—Current challenges facing us in developing dedicated position emission tomography (PET) system for metabolic breast mammography (PEM) and small animal (ANIPET) are to achieve high spatial resolution (less than 2 mm) and high efficiency. It is also crucial to extend the sensitive areas of PE ...
... Abstract—Current challenges facing us in developing dedicated position emission tomography (PET) system for metabolic breast mammography (PEM) and small animal (ANIPET) are to achieve high spatial resolution (less than 2 mm) and high efficiency. It is also crucial to extend the sensitive areas of PE ...
QIBA proffered UPICT protocol for solid tumors - QIBA Wiki
... These image acquisition, processing, and analysis procedures are intended for use in patients with cancer who are followed with serial CT scans to assess their responses to treatment. Changes in volume that exceed 30% are highly likely to represent true biological evolution in the health status of a ...
... These image acquisition, processing, and analysis procedures are intended for use in patients with cancer who are followed with serial CT scans to assess their responses to treatment. Changes in volume that exceed 30% are highly likely to represent true biological evolution in the health status of a ...
Enhancing Vascular Imaging by OCT at the Charité Hospital
... to assess the correct positioning (apposition) of self-expanding and conventional stents. OCT is considered uniquely powerful as a tool: To determine the behavior or apposition of stents during procedures or follow-up, and to image the coverage of the stent struts with neointimal tissue. Specific app ...
... to assess the correct positioning (apposition) of self-expanding and conventional stents. OCT is considered uniquely powerful as a tool: To determine the behavior or apposition of stents during procedures or follow-up, and to image the coverage of the stent struts with neointimal tissue. Specific app ...
CdTe and CdZnTe detectors in nuclear medicine
... contrast. Spatial localisation of the primary photon's source in SP studies is achieved by the use of a collimator, basically a slab of lead absorber containing long thin, typically parallel, bores. The bore con"nes the detector's "eld of view to a narrow, forward cone at each position of its surfac ...
... contrast. Spatial localisation of the primary photon's source in SP studies is achieved by the use of a collimator, basically a slab of lead absorber containing long thin, typically parallel, bores. The bore con"nes the detector's "eld of view to a narrow, forward cone at each position of its surfac ...
Positron emission tomography
Positron emission tomography (PET) is a nuclear medicine, functional imaging technique that produces a three-dimensional image of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is introduced into the body on a biologically active molecule. Three-dimensional images of tracer concentration within the body are then constructed by computer analysis. In modern PET-CT scanners, three dimensional imaging is often accomplished with the aid of a CT X-ray scan performed on the patient during the same session, in the same machine.If the biologically active molecule chosen for PET is fluorodeoxyglucose (FDG), an analogue of glucose, the concentrations of tracer imaged will indicate tissue metabolic activity as it corresponds to the regional glucose uptake. Use of this tracer to explore the possibility of cancer metastasis (i.e., spreading to other sites) is the most common type of PET scan in standard medical care (90% of current scans). However, on a minority basis, many other radioactive tracers are used in PET to image the tissue concentration of other types of molecules of interest. One of the disadvantages of PET scanners is their operating cost.