CBCT: sebuah tinjauan teknik pencitraan moderen
... shortcomings of 2-D imaging, produces a smaller radiation dose than that produced by medical CT and enables clinicians to make more accurate treatment planning decisions, which can lead to more successful surgical procedures. Questions that cannot be answered in the dentist’s office with conventiona ...
... shortcomings of 2-D imaging, produces a smaller radiation dose than that produced by medical CT and enables clinicians to make more accurate treatment planning decisions, which can lead to more successful surgical procedures. Questions that cannot be answered in the dentist’s office with conventiona ...
Introduction to Medical Imaging Medical Imaging
... • The body is the gamma ray source and the image records transmission of gamma photons r I d ( x, y ) = ∫ s ( x, y, z )dl ) • The integral is a line-integral or a “projection” through obj • Source s(x,y,z) usually represents a selective uptake of a radio-labeled pharmaceutical ...
... • The body is the gamma ray source and the image records transmission of gamma photons r I d ( x, y ) = ∫ s ( x, y, z )dl ) • The integral is a line-integral or a “projection” through obj • Source s(x,y,z) usually represents a selective uptake of a radio-labeled pharmaceutical ...
The Entire Imaging Chain. Efficient and Easy.
... All confocal laser scanning microscopes are developed and produced specifically for daily practical use. Within the scope of their intended usage, they are robust devices suitable for a variety of applications. Confocal images can be generated and analyzed in just a few steps. ...
... All confocal laser scanning microscopes are developed and produced specifically for daily practical use. Within the scope of their intended usage, they are robust devices suitable for a variety of applications. Confocal images can be generated and analyzed in just a few steps. ...
Computed Tomography Machines
... First invented scanners were only dedicated to head imaging Full body CAT scan machines were not widely available until 1980 Over the years, scan speeds have drastically increased going from a few hours to just minutes The resolution of the scanned images are 16x better Improved designs of the machi ...
... First invented scanners were only dedicated to head imaging Full body CAT scan machines were not widely available until 1980 Over the years, scan speeds have drastically increased going from a few hours to just minutes The resolution of the scanned images are 16x better Improved designs of the machi ...
SPECT/CT Preparation
... SPECT/CT combines two imaging techniques – Nuclear Medicine SPECT which demonstrates function and CT (computed tomography) which demonstrates detailed anatomy. SPECT shows function at the cellular level within the body, and CT shows exactly where the abnormality is located in the body. Combining the ...
... SPECT/CT combines two imaging techniques – Nuclear Medicine SPECT which demonstrates function and CT (computed tomography) which demonstrates detailed anatomy. SPECT shows function at the cellular level within the body, and CT shows exactly where the abnormality is located in the body. Combining the ...
Using Positron Emission Tomography (PET) microdosing
... may be limited by the relatively short half-life 2003). Both techniques rely on the analysis of radionuclides incorporated into the test of common radionuclides (20 min for 11C ...
... may be limited by the relatively short half-life 2003). Both techniques rely on the analysis of radionuclides incorporated into the test of common radionuclides (20 min for 11C ...
Nuclear Imaging
... • Energy filter at 511keV filter Compton scattered events. • Reduced patient dose as no collimation is required! • SNR usually 5 times improved over SPECT (+13dB). • Detectors must cover 180o increased cost over SPECT • Due to poor SNR resolution only about 1cm. • Time of flight detection gives some ...
... • Energy filter at 511keV filter Compton scattered events. • Reduced patient dose as no collimation is required! • SNR usually 5 times improved over SPECT (+13dB). • Detectors must cover 180o increased cost over SPECT • Due to poor SNR resolution only about 1cm. • Time of flight detection gives some ...
radiation dose patient information
... • Computed Tomography (CT) exams: A special X-ray machine takes cross-sectional images of the body, which provide greater detail than traditional X-ray images. • Interventional procedures: Physicians use fluoroscopy to guide procedures inside the body. • Nuclear medicine & PET proc ...
... • Computed Tomography (CT) exams: A special X-ray machine takes cross-sectional images of the body, which provide greater detail than traditional X-ray images. • Interventional procedures: Physicians use fluoroscopy to guide procedures inside the body. • Nuclear medicine & PET proc ...
PET/CT Issues: CT-based attenuation correction (CTAC), Artifacts
... attenuation correction tables are used Truncation of CT image Can cause artifacts in corresponding regions in PET image unless wide-field CT image reconstruction is used - this should always be used by default Bias in the CT image due to beam-hardening and scatter from the arms in the field of view ...
... attenuation correction tables are used Truncation of CT image Can cause artifacts in corresponding regions in PET image unless wide-field CT image reconstruction is used - this should always be used by default Bias in the CT image due to beam-hardening and scatter from the arms in the field of view ...
IEEE Transactions on Medical Imaging Special Issue Call for Papers
... Since machine learning for image reconstruction is a new area, we are open to innovative ideas and significant results in the spirit of artificial intelligence especially learning from data. A strong evaluation component is required to compare quantitatively the images reconstructed via machine lear ...
... Since machine learning for image reconstruction is a new area, we are open to innovative ideas and significant results in the spirit of artificial intelligence especially learning from data. A strong evaluation component is required to compare quantitatively the images reconstructed via machine lear ...
Gallium isotopes in medicine Ga is a radioactive isotope that emits
... positron – the antimatter counterpart of the electron, with a mass identical to that of the electron and an equal but opposite (positive) charge. [return] positron emission tomography (PET) scan – an imaging technique that is used to observe metabolic activity within the body. The system detects pai ...
... positron – the antimatter counterpart of the electron, with a mass identical to that of the electron and an equal but opposite (positive) charge. [return] positron emission tomography (PET) scan – an imaging technique that is used to observe metabolic activity within the body. The system detects pai ...
Windowing - Pharos University in Alexandria
... By solving a system of linear equations for several projections, value of u can be computed. ...
... By solving a system of linear equations for several projections, value of u can be computed. ...
Introduction to medical imaging
... • In general, CT images are only obtained after a problem has been identified with a single projection X-ray or ultrasound image; however, there are clinical situations (a head injury, for example) in which the clinician will request a CT image as the first investigation. • CT is particularly useful ...
... • In general, CT images are only obtained after a problem has been identified with a single projection X-ray or ultrasound image; however, there are clinical situations (a head injury, for example) in which the clinician will request a CT image as the first investigation. • CT is particularly useful ...
Oncology Section
... invivo •Elucidated not only pathways but cellular networks (hallmarks). Define imaging based on these hallmarks, leading to go/no-go •Open access to data ...
... invivo •Elucidated not only pathways but cellular networks (hallmarks). Define imaging based on these hallmarks, leading to go/no-go •Open access to data ...
dave_1_Ana516
... Inject Patient with Radioactive Drug Late 1960’s Drug travels to metabolically active sites (many tumors have high metabolic activity) Drug emits (+) positrons (basically a positively charged electron) FDG - Fluorodeoxyglucose (most common drug) (F18 – + emitter – two hour half-life) Advantage fun ...
... Inject Patient with Radioactive Drug Late 1960’s Drug travels to metabolically active sites (many tumors have high metabolic activity) Drug emits (+) positrons (basically a positively charged electron) FDG - Fluorodeoxyglucose (most common drug) (F18 – + emitter – two hour half-life) Advantage fun ...
Lecture 1(4)- Sources in diagnostic Rad. – Computed Tomography
... faster scanning which allows, for example, an examination in a single held breath; ...
... faster scanning which allows, for example, an examination in a single held breath; ...
No Slide Title
... body tissue with high doses of x-rays or radionuclides such as cobalt. •Irradiation of cells is used in treating diseases such as cancer ...
... body tissue with high doses of x-rays or radionuclides such as cobalt. •Irradiation of cells is used in treating diseases such as cancer ...
MRI-Guided Therapy Garnette Sutherland, MD University of Calgary
... enabling computerized tomography, which was joined by positron emission tomography and MRI in the 1980s. These brain-slice imaging technologies allow precise localization within each slice and can be used to show the effects of additive or destructive lesions on brain structure and function. MR tech ...
... enabling computerized tomography, which was joined by positron emission tomography and MRI in the 1980s. These brain-slice imaging technologies allow precise localization within each slice and can be used to show the effects of additive or destructive lesions on brain structure and function. MR tech ...
Special Issue on Medical Imaging
... forming them. Modern-day imaging systems rely on tomographic image reconstruction based on the solution of ill-posed inverse problems. Today's functional brain mapping involves a complex pipeline of image processing, machine learning, and statistical resampling procedures, leading to images depictin ...
... forming them. Modern-day imaging systems rely on tomographic image reconstruction based on the solution of ill-posed inverse problems. Today's functional brain mapping involves a complex pipeline of image processing, machine learning, and statistical resampling procedures, leading to images depictin ...
radiology services - Ministry of Health
... MRI scanners use magnets and radio waves to produce detailed pictures of the inside of the body. MRI scans can show bones, muscles, joints, blood vessels, nerves and other structures in great detail. The key component of MRI scanners is the magnet, which determines the scanner’s Field Strength, and ...
... MRI scanners use magnets and radio waves to produce detailed pictures of the inside of the body. MRI scans can show bones, muscles, joints, blood vessels, nerves and other structures in great detail. The key component of MRI scanners is the magnet, which determines the scanner’s Field Strength, and ...
Scientific Stage
... and adolescents. There are no specific patterns of complaints. Swelling and pain are the only complaints where patients suffer from. At diagnosis, an osteosarcoma is often only localized. Metastases at diagnosis are there in 15-20 % of the cases. The current therapy exists of neo-adjuvant chemothera ...
... and adolescents. There are no specific patterns of complaints. Swelling and pain are the only complaints where patients suffer from. At diagnosis, an osteosarcoma is often only localized. Metastases at diagnosis are there in 15-20 % of the cases. The current therapy exists of neo-adjuvant chemothera ...
First generation CT
... • CAT Scan ---- Computerized Axial Tomography • CT Scan ---- Computed Tomography ...
... • CAT Scan ---- Computerized Axial Tomography • CT Scan ---- Computed Tomography ...
Pre and Post-treatment Radiology Work
... Higher sensitivity than MRI/CT c. Combined modality of choice d. Eliminates false-positive & false-negative findings e. Agent used: 18-F Fluoro – deoxyglucose f. FDG dose, timing of scan & injection, imaging time, surrounding muscular activity and technical factors associated with image acquisition ...
... Higher sensitivity than MRI/CT c. Combined modality of choice d. Eliminates false-positive & false-negative findings e. Agent used: 18-F Fluoro – deoxyglucose f. FDG dose, timing of scan & injection, imaging time, surrounding muscular activity and technical factors associated with image acquisition ...
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.