1 Introduction to medical imaging
... Iodinated (iodine containing) water-soluble contrast media may be injected into veins, arteries, and various body cavities and systems. Iodinated contrast materials are used in CT (see below), angiography (DSA) (Fig. 1.4) and arthrography (injection into joints). ...
... Iodinated (iodine containing) water-soluble contrast media may be injected into veins, arteries, and various body cavities and systems. Iodinated contrast materials are used in CT (see below), angiography (DSA) (Fig. 1.4) and arthrography (injection into joints). ...
Turning the Light on Alzheimer`s: PET•CT Solution
... State Exam) score, which measures cognitive decline. While providing some insight into the situation, these screening techniques can be unreliable and are limited in their ability to identify earlystage disease. Further lab tests, such as B12 and TSH, may help in the evaluation by ruling out other c ...
... State Exam) score, which measures cognitive decline. While providing some insight into the situation, these screening techniques can be unreliable and are limited in their ability to identify earlystage disease. Further lab tests, such as B12 and TSH, may help in the evaluation by ruling out other c ...
IET_Portsmouth_110217
... • Plane-film X-ray maps the total attenuation of X-rays along a path through the body, giving a projection image. Good for bone structure in ...
... • Plane-film X-ray maps the total attenuation of X-rays along a path through the body, giving a projection image. Good for bone structure in ...
Varian TrueBeam
... cancer cases including lung, breast, liver, abdomen, head and neck • IMRT, IGRT, RapidArc, Gated RapidArc, SBRT, SRS ...
... cancer cases including lung, breast, liver, abdomen, head and neck • IMRT, IGRT, RapidArc, Gated RapidArc, SBRT, SRS ...
Optimizing pediatric brain imaging
... the most homogeneous fat suppression occurs with a frequency offset of 80 Hz. This value can be plugged into all fat suppressed scans performed on this patient to achieve the best results. ...
... the most homogeneous fat suppression occurs with a frequency offset of 80 Hz. This value can be plugged into all fat suppressed scans performed on this patient to achieve the best results. ...
Neural Imaging Using Single-Photon Avalanche Diodes
... ers for covering the short lifetime of the radiotracers (Phelps, 2004). Tomographic images are reconstructed through projection data provided by collinear annihilation photons that were detected by PET. SPADs are used as the single-photon sensitive detectors to locate the photon arrival spatially an ...
... ers for covering the short lifetime of the radiotracers (Phelps, 2004). Tomographic images are reconstructed through projection data provided by collinear annihilation photons that were detected by PET. SPADs are used as the single-photon sensitive detectors to locate the photon arrival spatially an ...
CHAPTER 1 The Nature of DICOM
... sphere of the beam is a fixed ring of detectors that measures how many of the x-rays are being absorbed by the body. Rather than spin around the body, CT scanners now spiral around the body allowing dense and continuous datasets to be acquired. In recent years there has been a rapid development in C ...
... sphere of the beam is a fixed ring of detectors that measures how many of the x-rays are being absorbed by the body. Rather than spin around the body, CT scanners now spiral around the body allowing dense and continuous datasets to be acquired. In recent years there has been a rapid development in C ...
Mammoscintigraphy
... Literature Results on SPEM • SPEM was compared with a large field of view camera using Tc99m-sestamibi • The small size of the detector head allows the use of mechanical breast compression to minimize detection distance and tissue scatter • Found a 0.4 cm breast lesion that was missed on an Anger C ...
... Literature Results on SPEM • SPEM was compared with a large field of view camera using Tc99m-sestamibi • The small size of the detector head allows the use of mechanical breast compression to minimize detection distance and tissue scatter • Found a 0.4 cm breast lesion that was missed on an Anger C ...
The Point Source - Philips InCenter
... model.2 In both cases, the resulting attenuation map is a matrix of linear attenuation coefficients at 100 keV (the emission peak for Gd-153). Furthermore, the application of attenuation correction during the iterative reconstruction process is also the same for Vantage and CT-AC. The attenuation ma ...
... model.2 In both cases, the resulting attenuation map is a matrix of linear attenuation coefficients at 100 keV (the emission peak for Gd-153). Furthermore, the application of attenuation correction during the iterative reconstruction process is also the same for Vantage and CT-AC. The attenuation ma ...
Computed Tomography (CT) - Sinuses
... patient needs to lie still is reduced. Though the scanning itself causes no pain, there may be some discomfort from having to remain still for several minutes. If you have a hard time staying still, are claustrophobic or have chronic pain, you may find a CT exam to be stressful. The technologist or ...
... patient needs to lie still is reduced. Though the scanning itself causes no pain, there may be some discomfort from having to remain still for several minutes. If you have a hard time staying still, are claustrophobic or have chronic pain, you may find a CT exam to be stressful. The technologist or ...
Safety Reports Series No.58
... applications generated and validated in the clinical environment. Regulation, industrial standardization, safety procedures and advice on best practices lag (inevitably) behind the industrial and clinical innovations. This series of Safety Reports (Nos 58, 60 and 61) is designed to help fill the gro ...
... applications generated and validated in the clinical environment. Regulation, industrial standardization, safety procedures and advice on best practices lag (inevitably) behind the industrial and clinical innovations. This series of Safety Reports (Nos 58, 60 and 61) is designed to help fill the gro ...
Computed Tomography
... In this expression µ is the effective linear attenuation coefficient for the X-ray beam. This scale is so defined that air and water respectively have the following CT numbers: –1000 and 0 HU. Clinical use Compared to the projection images in conventional X-ray photography, the slice images give a m ...
... In this expression µ is the effective linear attenuation coefficient for the X-ray beam. This scale is so defined that air and water respectively have the following CT numbers: –1000 and 0 HU. Clinical use Compared to the projection images in conventional X-ray photography, the slice images give a m ...
Performance of Philips Gemini TF PET/CT Scanner
... reconstruction algorithm, it is important to characterize the timing resolution of TOF PET scanners for varying counting rates. For this purpose we used a small (,0.3 mm) 22Na point source (halflife, 2.6 y) placed at the center of the scanner (Fig. 2A). Placed axially on either side of this point so ...
... reconstruction algorithm, it is important to characterize the timing resolution of TOF PET scanners for varying counting rates. For this purpose we used a small (,0.3 mm) 22Na point source (halflife, 2.6 y) placed at the center of the scanner (Fig. 2A). Placed axially on either side of this point so ...
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... between 18F-FDG kinetics and oxygen metabolism. A high rate of glucose consumption without a high rate of oxygen metabolism would imply that some glucose is being metabolized inefficiently, presumably due to an insufficient supply of oxygen. In addition, co-registration of total hemoglobin concentra ...
... between 18F-FDG kinetics and oxygen metabolism. A high rate of glucose consumption without a high rate of oxygen metabolism would imply that some glucose is being metabolized inefficiently, presumably due to an insufficient supply of oxygen. In addition, co-registration of total hemoglobin concentra ...
Phantom and in vivo measurements of dose exposure by image
... acquired while limiting the radiation dose absorbed to the patient? More specifically, which of these imaging modalities is the most efficient for purposes of image-guided radiotherapy? ...
... acquired while limiting the radiation dose absorbed to the patient? More specifically, which of these imaging modalities is the most efficient for purposes of image-guided radiotherapy? ...
Diagnostic nuclear medicine in pediatric oncology-what
... Wider application of pediatric nuclear medicine as a specific and particularly delicate field of nuclear medicine started in the 70s (1). The methods made it possible to obtain diagnostic information which was not easily, if at all, obtainable by means of other diagnostic procedures (1). Breakthroug ...
... Wider application of pediatric nuclear medicine as a specific and particularly delicate field of nuclear medicine started in the 70s (1). The methods made it possible to obtain diagnostic information which was not easily, if at all, obtainable by means of other diagnostic procedures (1). Breakthroug ...
Original articles Validation of anatomical standardization of FDG
... A method of anatomical standardization, also called spatial standardization, is commonly used by investigators to compare brain positron emission tomography (PET) images of different subjects voxel by voxel and for intersubject statistical analyses. Although it may seem preferable to obtain morpholo ...
... A method of anatomical standardization, also called spatial standardization, is commonly used by investigators to compare brain positron emission tomography (PET) images of different subjects voxel by voxel and for intersubject statistical analyses. Although it may seem preferable to obtain morpholo ...
Direct Electrode Stimulation Direct electrode stimulation involves
... of brain areas that are particularly active during a given task by detecting changes in oxygen levels in the blood flowing through the brain. This procedure is based on a standard MRI and measures blood oxygen levels in the functioning brain; a computer analyses blood oxygen levels in the area and c ...
... of brain areas that are particularly active during a given task by detecting changes in oxygen levels in the blood flowing through the brain. This procedure is based on a standard MRI and measures blood oxygen levels in the functioning brain; a computer analyses blood oxygen levels in the area and c ...
Title: Multimodal TOF PET and/or SPECT probe operating in low
... issues. In patients with negative systematic biopsies, imaging may be helpful in localizing prostate cancers that would otherwise be missed. For patients already diagnosed with cancer, imaging can assist in better defining the location and margins of the tumor. Finally, there is increasing interest ...
... issues. In patients with negative systematic biopsies, imaging may be helpful in localizing prostate cancers that would otherwise be missed. For patients already diagnosed with cancer, imaging can assist in better defining the location and margins of the tumor. Finally, there is increasing interest ...
Three-Dimensional Imaging in Paleoanthropology and Prehistoric
... 3D images have had a great impact on paleoanthropology. Visualization of intraosseus cavities such as cranial sinuses and semi-circular channels has opened the way to analysis of once invisible structures. Certainly the most clear-cut benefit of 3D imaging techniques involves morphometric analysis. ...
... 3D images have had a great impact on paleoanthropology. Visualization of intraosseus cavities such as cranial sinuses and semi-circular channels has opened the way to analysis of once invisible structures. Certainly the most clear-cut benefit of 3D imaging techniques involves morphometric analysis. ...
this file
... •X-ray tube and detectors rotate around the patient, with the axis of rotation running from the patient’s head to toe •Detectors measure the average linear attenuation coefficient, µ, between the tube and detectors •Attenuation coefficient reflects the degree to which the X-ray intensity is reduced ...
... •X-ray tube and detectors rotate around the patient, with the axis of rotation running from the patient’s head to toe •Detectors measure the average linear attenuation coefficient, µ, between the tube and detectors •Attenuation coefficient reflects the degree to which the X-ray intensity is reduced ...
Innovations in Cardiac Computed Tomography: Cone
... 1970s with the introduction of single-detector CT scanners that captured one slice per rotation. In 1992, the first Multi-Detector CT (MDCT) scanner was produced (CT-Twin, Elscint) capturing two slices per rotation.2 Since then, the field has advanced to the point where modern MDCT scanners are rout ...
... 1970s with the introduction of single-detector CT scanners that captured one slice per rotation. In 1992, the first Multi-Detector CT (MDCT) scanner was produced (CT-Twin, Elscint) capturing two slices per rotation.2 Since then, the field has advanced to the point where modern MDCT scanners are rout ...
ACR-AAPM Technical Standard for Medical Nuclear Physics
... The primary goal of PET imaging is to produce quantifiably accurate images representing the biodistribution of an administered radiopharmaceutical. An additional goal is to produce images with the lowest reasonable radiation dose consistent with the clinical use of the equipment and the information ...
... The primary goal of PET imaging is to produce quantifiably accurate images representing the biodistribution of an administered radiopharmaceutical. An additional goal is to produce images with the lowest reasonable radiation dose consistent with the clinical use of the equipment and the information ...
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.