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The American College of Radiology, with more than 30,000
The American College of Radiology, with more than 30,000

... Society of Neuroradiology (ASNR), and the Society for Pediatric Radiology (SPR). Computed tomography (CT) perfusion is a technique used in neuroradiology to assess tissue-level perfusion and delivery of blood to the brain and/or tissues of the head and neck. The linear relationship between CT Hounsf ...
Medical Image Processing Overview
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... imaging modalities, more challenges arise; for example, how to process and analyze a significant volume of images so that high quality information can be produced for disease diagnoses and treatment. The principal objectives of this course are to provide an introduction to basic concepts and techniq ...
Positive Contrast Agents
Positive Contrast Agents

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Coregistered tomographic x-ray and optical breast imaging: initial
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Radiopharmaceuticals: Production and Availability
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... therapeutic medicine immediately after the discovery of radioactivity, the first significant applications came much later with the availability of cyclotrons for acceleration of particles to produce radioisotopes. Subsequently, nuclear reactors realised the ability to prepare larger quantities of ra ...
The SENSE ghost: Field-of-view restrictions for SENSE imaging
The SENSE ghost: Field-of-view restrictions for SENSE imaging

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!"#$%"&'()*)+,"-$.)/$012+"$342*,56$017/)8"1"(5 $2(9$:)-"$;"94&<)($,($=%$

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Three Cases of Elongated Mandibular Coronoid Process with

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Spirometer-controlled cine magnetic resonance imaging used to diagnose tracheobronchomalacia in paediatric

... has the disadvantage that it is invasive and requires general anaesthesia, while the child maintains spontaneous breathing [1]. In addition, relevant daily life breathing manoeuvres, such as forced expiration and coughing, cannot be routinely performed during the procedure [3–4]. Bronchoscopy using ...
Fusion of MRIs and CT Scans for Surgical Treatment of
Fusion of MRIs and CT Scans for Surgical Treatment of

... Results: In 10 children, fusion technique allowed for correct diagnosis and precise localization (hypotympanum, epitympanum, mastoid recess, and attical space) as confirmed by subsequent standard surgery (positive predictive value, 100%). In 3 cases, the surgical approach was adequately determined f ...
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Image-guided radiation therapy

Image-guided radiation therapy (IGRT) is the process of frequent two and three-dimensional imaging, during a course of radiation treatment, used to direct radiation therapy utilizing the imaging coordinates of the actual radiation treatment plan. The patient is localized in the treatment room in the same position as planned from the reference imaging dataset. An example of IGRT would include localization of a cone beam computed tomography (CBCT) dataset with the planning computed tomography (CT) dataset from planning. IGRT would also include matching planar kilovoltage (kV) radiographs or megavoltage (MV) images with digital reconstructed radiographs (DRRs) from the planning CT. These two methods comprise the bulk of IGRT strategies currently employed circa 2013.This process is distinct from the use of imaging to delineate targets and organs in the planning process of radiation therapy. However, there is clearly a connection between the imaging processes as IGRT relies directly on the imaging modalities from planning as the reference coordinates for localizing the patient. The variety of medical imaging technologies used in planning includes x-ray computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography (PET) among others. The precision of IGRT is significantly improved when N-localizer technology is used in conjunction with these medical imaging technologies. Through advancements in imaging technology, combined with a further understanding of human biology at the molecular level, the impact of IGRT on radiotherapy treatment continues to evolve.
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