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TERMS AND ABBREVIATIONS USED IN PART 2
ОглавлениеWherever possible, generic terms have been used to describe protocol parameters, particularly pulse sequences and imaging options. Explanations of these can be found in the various sections of Part 1. To avoid ambiguity, the specific following terms have been used:
Fat suppression: includes all fat suppression techniques such as fat saturation (FAT SAT), spectrally selective inversion recovery (SPIR) and Dixon methods.
Gradient moment nulling (GMN): gradient moment rephasing (GMR) and flow compensation (FC).
Oversampling: no phase wrap, anti‐aliasing and anti‐foldover
Rectangular FOV: rectangular or asymmetric FOV
Respiratory compensation (RC): phase reordering and respiratory triggering techniques
Abbreviations are used throughout the book for simplification purposes. A summary of these can be found in Table 1.1. In addition, Table 1.2 summarizes the slice prescription parameters for each examination in Part 2 and a comparison of acronyms used by certain vendors to describe pulse sequences and imaging options is given in Table 3.1 (see Pulse sequences in Part 1).
Table 1.1 Abbreviations used in this book.
A | Anterior |
AC | Number of acquisitions |
ACL | Anterior cruciate ligament |
ACPC | Anterior–posterior commissure axis |
ACR | American College of Radiologists |
ADC | Apparent diffusion coefficient |
ADEM | Acute disseminating encephalomyelitis |
AIDS | Autoimmune deficiency syndrome |
ASIS | Anterior superior iliac spine |
ASTM | American Society for Testing and Materials |
AVM | Arteriovenous malformation |
AVN | Avascular necrosis |
BFFE | Balanced fast field echo |
BGRE | Balanced gradient echo |
BOLD | Blood oxygenation level dependent |
CDH | Congenital dislocation of the hips |
CE‐MRA | Contrast enhanced magnetic resonance angiography |
CNR | Contrast to noise ratio |
CNS | Central nervous system |
COPD | Chronic obstructive pulmonary disease |
CSE | Conventional spin echo |
CSF | Cerebral spinal fluid |
CSI | Chemical shift imaging |
CSR | Chemical shift ratio |
CT | Computer tomography |
CVA | Cerebral vascular accident |
DE Prep | Driven equilibrium magnetization preparation |
DTI | Diffusion tensor imaging |
DWI | Diffusion weighted imaging |
EAM | External auditory meatus |
ECG | Electrocardiogram |
EKG | Electrocardiogram (US spelling) |
EPI | Echo planar imaging |
ETL | Echo train length |
FA | Fractional anisotropy |
FAT SAT | Fat saturation |
FC | Flow compensation |
FDA | Food and Drug Administration |
FFE | Fast field echo |
FID | Free induction decay |
FIESTA | Free induction echo stimulated acquisition |
FISP | Free induction steady precession |
FLAIR | Fluid attenuated inversion recovery |
FLASH | Fast low angled shot |
fMRI | Functional magnetic resonance imaging |
FOV | Field of view |
FSE | Fast spin echo |
Gd | Gadolinium |
GFE | Gradient field echo |
GMN | Gradient moment nulling |
GMR | Gradient moment rephasing |
GRASS | Gradient recalled acquisition in the steady state |
GRE | Gradient echo |
GRE‐EPI | Gradient echo – echo planar imaging |
HASTE | Half acquisition single‐shot turbo spin echo |
HIE | Hypoxic ischemic event |
I | Inferior |
IAM | Internal auditory meatus |
ICP | Intracranial pressure |
IM | Intramuscular |
IR | Inversion recovery |
IR‐FSE | Inversion recovery – fast spin echo |
IR prep | Inversion recovery magnetization preparation |
IV | Intravenous |
IVC | Inferior vena cava |
L | Left |
MDA | Medical Devices Agency |
MIP | Maximum intensity projection |
MOTSA | Multiple overlapping thin slab acquisition |
MP RAGE | Magnetization prepared rapid acquisition gradient echo |
MR | Magnetic resonance |
MRA | Magnetic resonance angiography |
MRCP | Magnetic resonance cholangiopancreatography |
MRE | Magnetic resonance enterography |
MRI | Magnetic resonance imaging |
MRS | Magnetic resonance spectroscopy |
MS | Multiple sclerosis |
MSK | Musculoskeletal |
MT | Magnetization transfer |
MVS | Multi‐voxel spectroscopy |
NEX | Number of excitations |
NSA | Number of signal averages |
NSF | Nephrogenic systemic fibrosis |
P | Posterior |
PC | Phase contrast |
PC‐MRA | Phase contrast magnetic resonance angiography |
PD | Proton density |
Pe | Peripheral |
PEAR | Phase encoding artefact reduction |
PET | Proton emission tomography |
ppm | Parts per million |
PRESS | Point resolved spectroscopy |
PSIF | Reverse FISP |
R | Right |
RC | Respiratory compensation |
REST | Regional saturation technique |
RF | Radio frequency |
ROI | Region of interest |
RR | R to R interval |
S | Superior |
SAR | Specific absorption rate |
SAT | Saturation |
SE‐EPI | Spin echo – echo planar imaging |
SNR | Signal to noise ratio |
SPAMM | Spatial modulation of magnetization |
SPGR | Spoiled gradient recalled acquisition in the steady state |
SPIR | Spectrally selective inversion recovery |
SS | Single shot |
SS‐EPI | Single‐shot echo planar imaging |
SSFP | Steady‐state free precession |
SS‐FSE | Single‐shot fast spin echo |
SS‐GRE‐EPI | Single‐shot gradient echo EPI |
STEAM | Stimulated echo acquisition mode |
STIR | Short TAU inversion recovery |
SVS | Single‐voxel spectroscopy |
SW | Susceptibility weighted |
TE | Time to echo |
TF | Turbo factor |
TFE | Turbo field echo |
TI | Time to inversion |
TIA | Transient ischaemic attack |
TLE | Temporal lobe epilepsy |
TMJ | Temporomandibular joint |
TOF | Time of flight |
TOF‐MRA | Time of flight magnetic resonance angiography |
TR | Time to repeat |
True FISP | Siemens version of balanced gradient echo |
TSE | Turbo spin echo |
VENC | Velocity encoding |
VNR | Velocity to noise ratio |
VOI | Volume of interest |
VQ | Ventilation perfusion scan |
Table 1.2 Summary of slice prescription criteria.
Area | Plane | Angle | Prescription | Coverage | |
---|---|---|---|---|---|
Brain | Sagittal | parallel to falx cerebri | lateral borders of each temporal lobe | foramen magnum to vertex and occiput to frontal lobe | |
Axial | parallel to falx cerebri and ACPC line | foramen magnum to superior surface of the brain | occipital lobe to frontal lobe and both temporal lobes | ||
Coronal | perpendicular to ACPC line | cerebellum to frontal lobe | foramen magnum to vertex and both temporal lobes | ||
Temporal lobes | Sagittal | parallel to falx cerebri | lateral borders of each temporal lobe | foramen magnum to vertex and occiput to frontal lobe | |
Axial | parallel to temporal lobes and falx cerebri | inferior aspect of temporal lobes to superior border of body of corpus callosum | occipital lobe to frontal lobe and both temporal lobes | ||
Coronal | perpendicular to axial slices and parallel to falx cerebri | posterior cerebellum to anterior border of genu of corpus callosum | foramen magnum and vertex and both temporal lobes | ||
IAMs and posterior fossa | Sagittal | parallel to falx cerebri | through IAMs on both sides | foramen magnum to superior body of corpus callosum and both temporal lobes | |
Axial | perpendicular to falx cerebri and parallel to both IAMs | through the IAMs and posterior fossa | occipital lobe to frontal lobe and both temporal lobes | ||
Coronal | parallel to falx cerebri and a line between both IAMs | posterior border of cerebellum to clivus | foramen magnum to vertex and both temporal lobes | ||
Pituitary fossa | Sagittal | parallel to falx cerebri | through the pituitary fossa | inferior edge of sphenoid sinus to the superior portion of the lateral ventricles | |
Axial | parallel to falx cerebri | floor of the pituitary fossa to circle of Willis | occipital lobe to frontal lobe and both temporal lobes | ||
Coronal | parallel to falx cerebri | posterior to anterior clinoids | inferior border of sphenoid sinus to superior portion of lateral ventricles and both temporal lobes | ||
Orbits | Sagittal | parallel to rectus muscles and parallel to optic nerve (single orbit) | left to right lateral walls of bony orbit or entire brain (optic neuritis) | foramen magnum to vertex and from occipital to the frontal lobe | |
Axial | perpendicular to falx cerebri (in true plane or orientated to optic nerve) | inferior margin to above superior margin of orbits | lens of eye, globe, optic nerves and chiasm | ||
Coronal | perpendicular to optic nerve | optic chiasm to lens of the orbit | left and right lateral walls of the orbit | ||
Paranasal sinuses | Sagittal | perpendicular to hard palate | through paranasal sinuses | foramen magnum to vertex | |
Axial | perpendicular to nasal septum | inferior border of maxillary sinuses to superior edge of frontal sinuses | sphenoid sinus, tip of nose and lateral borders of all paranasal sinuses | ||
Coronal | perpendicular to hard palate | posterior portion of sphenoid sinus to tip of nose | inferior margin of maxillary sinuses to superior border of frontal sinuses | ||
Pharynx | Sagittal | parallel to cervical spine | left to right lateral walls of pharynx | skull base to thyroid cartilage | |
Axial | perpendicular to cervical spine | thyroid cartilage to base of skull | soft tissues of neck | ||
Coronal | parallel to cervical spine | posterior border of cervical cord to anterior surface of neck | skull base to sternoclavicular joints | ||
Larynx | Sagittal | parallel to cervical spine | left to right skin surfaces of the neck | superior border of hard palate to sternoclavicular joints | |
Axial | parallel to vocal cords | through laryngeal cartilages and vocal cords | both lateral skin surfaces of the neck | ||
Coronal | perpendicular to vocal cords | posterior surface of trachea to anterior surface of neck | superior border hard palate to sternoclavicular joints | ||
Thyroid/parathyroid | Axial | perpendicular to cervical spine | through thyroid | both lateral skin surfaces of neck | |
Coronal | parallel to cervical spine | through thyroid | mandible to arch of the aorta | ||
Salivary glands | Sagittal | parallel to cervical spine | left to right skin surfaces of the neck | base of the skull to hyoid bone | |
Axial | perpendicular to cervical spine | from superior aspect of EAM to angle of jaw or through submandibular glands | all skin surfaces of neck | ||
Coronal | perpendicular to hard palate and nasal septum | vertebral bodies to superior alveolar process | cervical lymph node chain and skull base | ||
TMJs | Sagittal | perpendicular to mandibular condyles and parallel to long axis of mandibular condyle | through each TMJ | both TMJs | |
Axial | orthogonal | through both TMJs | both TMJs | ||
Coronal | parallel to mandibular condyles | through both TMJs | both TMJs | ||
Cervical spine | Sagittal | parallel to long axis of spinal cord | from left to right lateral borders of vertebral bodies | base of skull to T2 | |
Axial | perpendicular to spinal cord and either parallel to disc space or perpendicular to lesion | lamina below to lamina above disc | bony cervical spine and surrounding soft tissue | ||
Coronal | parallel to long axis of spinal cord | posterior aspect of spinous processes to anterior border of vertebral bodies | base of skull to T2 and left to right borders of neck | ||
Thoracic spine | Sagittal | parallel to the long axis of the spinal cord | from left to right lateral borders of vertebral bodies | C7 to conus | |
Axial | perpendicular to spinal cord and either parallel to disc space or perpendicular to lesion | lamina below to lamina above disc | bony thoracic spine and surrounding soft tissue | ||
Coronal | long axis of spinal cord | posterior aspect of spinous processes to anterior border of vertebral bodies | C7 to conus | ||
Lumbar spine | Sagittal | parallel to spinal canal | left to right lateral borders of vertebral bodies | conus to sacrum | |
Axial | parallel to each disc space | lamina below to lamina above disc | exit foramina from T12 to S1 | ||
Coronal | parallel to long axis of spinal canal | posterior aspect of spinous processes to anterior border of vertebral bodies | conus to sacrum | ||
Whole spine | Sagittal | parallel to long axis of spinal cord | left to right lateral borders of vertebral bodies | base of skull to sacrum | |
Axial | parallel to spinal cord | base of skull to sacrum or ROI | bony spine and surrounding soft tissue | ||
Lungs and mediastinum | Coronal | orthogonal | posterior chest muscles to sternum | apices to lung bases | |
Axial | orthogonal | apices to lung bases | entire chest to skin surfaces | ||
Heart and great vessels | Coronal | orthogonal | posterior chest muscles to sternum | apices to lung bases | |
Axial | orthogonal | inferior border of heart to superior aspect of arch of aorta | entire chest to skin surfaces | ||
LA view | parallel to intraventricular septum | through left ventricle | entire chest cavity | ||
Four chamber | through apex of left ventricle and mitral valve | through left ventricle | entire chest cavity | ||
SA view | parallel to mitral valve | through left ventricle | entire chest cavity | ||
Thymus | Axial | orthogonal | through thymus | entire chest to skin surfaces | |
Breast | Sagittal | orthogonal | sternum to axilla | superior axillary tail to nipple and pectoralis muscle and chest wall | |
Axial | orthogonal | superior axillary tail to inferior margins of breast(s) | superior axillary tail to nipple and pectoralis muscle and chest wall | ||
Axilla | Sagittal | orthogonal | from sternoclavicular joint to humerus | both axillae or single axilla | |
Axial | orthogonal | through both axillae and supraclavicular fossae | both axillae | ||
Coronal | orthogonal | posterior chest muscles to sternum | both axillae | ||
Brachial plexus | Sagittal | perpendicular to long axis of symptomatic brachial plexus | spinal cord to medial aspect of humerus | C3 to aortic arch | |
Axial | perpendicular to long axis of C4 to C7 | arch of aorta to C3 | both shoulders and anterior neck | ||
Coronal | parallel to long axis of C4 to C7 | posterior aspect of cervical cord to sternoclavicular joints | C3 to aortic arch | ||
Liver/biliary system | Coronal | orthogonal | posterior abdominal peritoneum to anterior abdominal wall | pubis symphysis to diaphragm | |
Axial | orthogonal | diaphragm to inferior margin of liver | whole abdomen to skin surfaces | ||
Kidneys/adrenals | Coronal | orthogonal | posterior abdominal peritoneum to anterior abdominal wall | pubis symphysis to gastric ventricle | |
Axial | orthogonal | inferior margin of kidneys to superior aspect of adrenals | whole abdomen to skin surfaces | ||
Pancreas | Coronal | orthogonal | posterior abdominal peritoneum to anterior abdominal wall | pubis symphysis to gastric ventricle | |
Axial | orthogonal | through pancreas | whole abdomen to skin surfaces | ||
Bowel | Coronal | orthogonal | from posterior abdominal peritoneum to anterior abdominal wall | pubis symphysis to the gastric ventricle | |
Axial | orthogonal | gastric ventricle to pubis symphysis | whole abdomen to skin surfaces | ||
Prostate | Sagittal | perpendicular to prostatic/rectal junction | left to right margins of prostate and seminal vesicles | pubis symphysis to iliac crests | |
Axial | orthogonal or perpendicular to prostatic/rectal junction | pelvic floor to above seminal vesicles | prostate gland and surrounding structures | ||
Coronal | parallel to prostatic/rectal junction | posterior margin of prostate to symphysis pubis | pubis symphysis iliac crests | ||
Rectum and testes | Coronal | orthogonal | coccyx to anterior border of pubis symphysis | pubis symphysis to iliac crests | |
Axial | orthogonal | pelvic floor to iliac crests or through ROI | buttocks and rectum and to skin surfaces | ||
Ovaries and cervix | Coronal | orthogonal | coccyx to anterior border of pubis symphysis | pubis symphysis iliac crests | |
Sagittal | orthogonal | left to right pelvic side walls | pubis symphysis to the iliac crests | ||
Axial | orthogonal | pelvic floor to iliac crests or through ROI | whole pelvis to skin surfaces | ||
Shoulder | Coronal | parallel to supraspinatus muscle tendon | infraspinatus posteriorly to supraspinatus anteriorly | superior edge of acromion to inferior aspect of subscapularis muscle, deltoid muscle and distal third of supraspinatus muscle | |
Sagittal | parallel to supraspinatus tendon | medial to glenoid cavity to bicipital groove | distal portion of joint capsule to superior border of acromion | ||
Axial | orthogonal | from superior acromioclavicular joint (including the supraspinatus muscle) to inferior margin of glenoid | bicipital groove to distal supraspinatus muscle | ||
Humerus | Coronal | parallel to long axis of humerus and aligned with glenohumeral joint or humeral epicondyles | glenoid to proximal radius and ulna | whole humerus to skin surfaces | |
Sagittal | parallel to long axis of humerus and aligned with glenohumeral joint or humeral epicondyles | glenoid to proximal radius and ulna | whole humerus to skin surfaces | ||
Axial | perpendicular to long axis of the humerus | to include lesions seen on coronal or sagittal images | whole humerus or through ROI | ||
Elbow | Coronal | parallel to a line joining humeral epicondyles | posterior to anterior skin surfaces | whole elbow joint to skin surfaces | |
Sagittal | perpendicular to a line joining humeral epicondyles | medial to lateral borders of elbow | whole elbow joint to skin surfaces | ||
Axial | perpendicular to long axis of humerus and forearm | distal humerus to proximal radius and ulna | whole elbow joint to skin surfaces | ||
Forearm | Coronal | parallel to humeral epicondyles or to distal radio‐ulnar joint | posterior to anterior margins of forearm | whole of forearm from wrist to elbow | |
Sagittal | perpendicular to humeral epicondyles or to distal radio‐ulnar joint | posterior to anterior margins of forearm | whole of forearm from wrist to elbow | ||
Axial | perpendicular to coronal slices | well above and below lesions seen in sagittal and coronal planes | whole forearm to skin surfaces | ||
Wrist and hand | Coronal | parallel to proximal row of carpus | left to right skin surfaces of wrist | inferior border of carpal bones to distal portion of forearm | |
Sagittal | perpendicular to coronal plane | left to right skin surfaces of wrist | inferior border of carpal bones to distal portion of forearm | ||
Axial | parallel to proximal row of carpal bones | through ROI | distal radioulnar joint to include triangular fibrocartilage | ||
Hips | Coronal | angled to compensate for positional rotation of pelvis, demonstrating femoral heads equally on each side | posterior to anterior margins of musculature of hip | junction of ilium and superior acetabulum to below lesser trochanter | |
Sagittal | perpendicular to superior surface of femoral head | lateral aspect of greater trochanter through articular portions of acetabulum | proximal margin of femoral shaft (below the lesser trochanter) to greater sciatic notch | ||
Axial | parallel to superior surface of both femoral heads | above articular portion of acetabulum to superior edge of lesser trochanter | junction of ilium and superior acetabulum to below lesser trochanter | ||
Femur | Coronal | parallel to long axis of femur | anterior to posterior skin surfaces of thigh | entire length of femur | |
Sagittal | parallel to the long axis of the femur | from the left to right skin surfaces of the thigh | entire length of femur | ||
Axial | perpendicular to long axis of the femur | prescribed to extend from well below, to well above lesions seen on coronal or sagittal images | entire thigh to skin surfaces | ||
Knee | Coronal | parallel to posterior surfaces of femoral condyles | femoral condyles to anterior margin of patella | superior edge of patella to inferior edge of tibial tuberosity | |
Sagittal | parallel with ACL | lateral to medial collateral ligaments | superior edge of patella to below tibial tuberosity | ||
Axial | perpendicular to posterior surfaces of femoral condyles | superior surface of patella to tibial tuberosity | entire knee to skin surfaces | ||
Tibia and fibula | Coronal | parallel to interosseous ligament | posterior to anterior skin surfaces of calf | whole of tibia and fibula to skin surfaces | |
Sagittal | perpendicular to the interosseous ligament | left to right skin margins of calf | whole of tibia and fibula to skin surfaces | ||
Axial | perpendicular to long axis of the tibia | well above and below lesions seen in sagittal and coronal planes | whole calf to skin surfaces | ||
Ankle | Coronal | parallel to transmalleolar line | Achilles tendon to base of proximal metatarsals | inferior border of calcaneum to distal portion of tibia | |
Sagittal | parallel to mortise axially, to distal tibia coronally | from the lateral to medial aspects of the ankle | distal tibia to the sole of the foot and the tarsometatarsal joints | ||
Axial | perpendicular to long axis of distal tibia | superior margin of tibiofibular margin to bottom of calcaneum and base of fifth metatarsal | entire ankle joint to skin surfaces | ||
Foot | Coronal | proximally parallel to bases of the first to fourth metatarsals | metatarsophalangeal joints to tarsometatarsal joints | whole foot to skin surfaces | |
Sagittal | perpendicular to plane joining base of first to fourth metatarsals | lateral to medial aspects of foot | sole of foot to distal tibia | ||
Axial | perpendicular to metatarsals | metatarophalangeal joints to tarsometatarsal joints | whole foot to skin surfaces |