Items tagged “mri”
786 results found
Article
Larmor frequency
The Larmor frequency and equation are named after the Irish physicist and mathematician Joseph Larmor (1857–1942).
Protons and neutrons pair up in nuclei causing the cancelation of their individual angular momentum. All nuclei also have a spin; those with an odd number of protons and/or neutron...
Article
Net magnetization vector
The net magnetization vector in MRI is the summation of all the magnetic moments of the individual hydrogen nuclei.
In the absence of an external magnetic field, the individual magnetic moments are randomly oriented and since they are in opposition, the net magnetization vector is considered to...
Article
MRI
MRI (an abbreviation of magnetic resonance imaging) is an imaging modality that uses non-ionizing radiation to create useful diagnostic images.
In simple terms, an MRI scanner consists of a large, powerful magnet in which the patient lies. A radio wave antenna is used to send signals to the bod...
Article
Hemorrhage on MRI
Hemorrhage on MRI has highly variable imaging characteristics that depend on:
the age of the blood
the type of hemoglobin present: oxy-, deoxy- or met-
whether or not the red blood cell walls are intact: i.e. intra- vs extracellular
the MRI sequence
Although MRI is often regarded as being i...
Article
Rectal cancer (staging)
Staging of rectal cancer uses the TNM staging system and strongly predicts the success, and rate, of local recurrence following rectal cancer resection. MRI is the modality of choice for the staging of rectal cancer, to guide surgical and non-surgical management options. MRI is used at diagnosis...
Article
Turbo inversion recovery magnitude
Turbo inversion recovery magnitude (TIRM) is an inversion recovery MRI pulse sequence that displays the magnitude of a turbo/fast spin echo, without regard for the phase/polarity of the longitudinal magnetization. This method of image reconstruction is the dominant form of inversion recovery use...
Article
MRI pulse sequence abbreviations
This article contains a list of commonly and less commonly used MRI pulse sequence abbreviations and their meaning. If available, an explanation is included in a separate article.
image weighting
T1
T2
T2*: T2 star
PD: proton density
DWI: diffusion-weighted imaging and ADC: apparent diff...
Case
Haemophilic arthropathy
Published
11 Apr 2010
92% complete
MRI
X-ray
Case
Os acromiale with impingement
Published
12 Apr 2010
87% complete
MRI
X-ray
Case
Multiple biliary hamartomas
Published
13 Apr 2010
70% complete
Ultrasound
CT
MRI
Case
Popliteal artery entrapment syndrome
Published
15 Apr 2010
92% complete
MRI
Case
Breast cancer metastasis - femur (MRI)
Published
16 Apr 2010
73% complete
X-ray
MRI
Case
Morton neuroma
Published
05 May 2010
70% complete
Annotated image
MRI
Article
Testicular seminoma
Testicular seminomas are a type of germ cell tumor and the most common testicular tumor, accounting for ~45% of all primary testicular tumors. This article concerns only testicular seminomas; however, seminomas can arise outside of the testis, most often within the anterior mediastinum (see arti...
Case
Patella tendon lateral femoral condyle friction syndrome
Published
08 Aug 2010
80% complete
MRI
Case
Lumbar epidural arachnoid cyst
Published
20 Sep 2010
68% complete
MRI
Case
Spondylolisthesis - distended facet sign
Published
22 Sep 2010
74% complete
MRI
Case
Prostatic abscess (MRI)
Published
29 Sep 2010
80% complete
MRI
Case
Ependymitis granularis
Published
30 Sep 2010
62% complete
MRI
Article
Myo-inositol peak
Myo-inositol is one of the compounds images with MR spectroscopy (MRS) at both 1.5 T and 3 T and is seen to resonate at 3.5 ppm chemical shift (right of the choline peak).
Myo-inositol is a precursor of both phosphatidylinositol (the major inositol-containing phospholipid) and phosphatidylinos...
Unable to process the form. Check for errors and try again.