By Gary Liney
From 'AB platforms' to 'Zipper artefact' - even for the skilled practitioner in MRI, the plethora of technical phrases and acronyms will be daunting and bewildering. This concise yet finished consultant presents a good and useful creation to the whole diversity of this terminology. it will likely be a useful resource of reference for all scholars, trainees and doctors operating with MRI. greater than 800 phrases normally encountered in MR Imaging and Spectroscopy are sincerely outlined, defined and cross-referenced. Illustrations are used to augment and clarify the various definitions, and references to extra interpreting will aspect the reader to extra in-depth insurance. in addition to being a compendium of phrases from A to Z, the quantity concludes with an invaluable selection of appendices, which tabulate the various key constants, houses and equations of relevance.
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Extra resources for MRI from A to Z A Definitive Guide for Medical Professionals
Eight bits make up one byte; 1024 bits equal 1 kB. e. pixel intensity values) are typically stored as unsigned integers in 16 bits, although this varies. See byte for description of data types. ■ Black blood MR Angiography technique in which blood (flowing spins) appears dark compared to stationary tissue. See also high velocity signal loss and white blood. ■ Blipped EPI EPI sequence in which the phase encoding step is incremented by the same amount while the frequency gradient is switched to sample k-space in a regular trajectory.
CSI Chemical shift imaging. ■ CT Computer tomography (also formally known as CAT or computer assisted tomography). Medical imaging method utilising X-rays to obtain multi-planar images, first used in 1973. Unlike MRI, it has little soft-tissue contrast. It is still the modality of choice in certain areas, for example in radiotherapy planning, where the signal attenuation is used to estimate electron density, or in trauma or in spinal injuries where analysis of bone is crucial. ■ CTL coil RF receive-only surface coil array with selectable elements for imaging either the cervical, thoracic or lumbar spine.
5 tesla. BOLD changes are an indirect haemodynamic response to neuronal activation and lag behind by a few seconds. C 47 Dd ■ DAC A digital-to-analogue converter. This is hardware, which turns the digital signal generated by the double balanced mixer into an analogue signal for transmission. See also ADC. 3 GB of images. Being phased out in favour of optical discs (OD). ■ Daum needles Specially coated MR compatible biopsy needles to reduce susceptibility artefacts. ■ db/dt Pronounced ‘db by dt’.