Single voxel spectroscopy.

Slides:

Advertisements

Similar presentations

Bar graph showing the number of patients with respect to temporary diagnostic relief according to the 5-point patient outcome scale when interviewed 2.

Advertisements

Precontrast coronal T1-weighted view shows metastatic nodules (long arrows) from breast cancer in the vicinity of the left BPL and another metastatic mass.

Chart showing the distribution of vertebral osteonecrosis at different levels. Chart showing the distribution of vertebral osteonecrosis at different levels.

123I/Tc-99m sestamibi subtraction scan (top left); neck sonogram in region of cystic mass (top right); axial arterial phase CT scan (bottom left); and.

Image shows appearance of septum within dural sinus in a 68-year-old woman with normal results of an MR imaging examination. Image shows appearance of.

Normalized and averaged images of rGMC and I-123 iomazenil BP

A, MIP of 3 mm thickness of the 1.5T scan.

1H-MR-spectroscopy water-suppressed proton spectra of an 8-mL voxel located in the parietal region including predominantly normal-appearing white matter.

Serial axial T2-weighted images (2000/110/2 at treatment, 3400/100/4 at 6 months and 4000/100/3 at 10 months and 36 months after treatment) in a 52-year-old.

Examples of leukoencephalopathy grading.

Diffusion-weighted (TR = 3900, TE = 94, B = 1000, number of gradient directions = 90) imaging (A) with corresponding apparent diffusion coefficient map.

MEG SAMg2 data superimposed on coronal reformation (A), sagittal reformation (B), and axial MPRAGE MR imaging (C). MEG SAMg2 data superimposed on coronal.

A–C, DWI san (A) at the level of the atria of the lateral ventricles reveals areas of acute (hyperintense) infarction in the frontoparietal region and.

Normal schematic diagram of the aortic arch and the great vessels demonstrates the embryologic origins of the arch and its major branches. Normal schematic.

Normal MR imaging findings in a 59-year-old man with right SSHL

A 33-year-old woman with spinal CSF leak syndrome and multiple CSF leaks in the bilateral thoracic and lumbar spine. A 33-year-old woman with spinal CSF.

Percent of participants with severe lesions in the insular subcortex or cerebral white matter versus age. Percent of participants with severe lesions in.

VBM results for differences in WM volume between patients with POAG and disease-free control subjects. VBM results for differences in WM volume between.

Bar graph of the number of averaged activated voxels (normalized to control values), as defined by increases in lactate concentration in the left frontal.

Postmyelography CTs showing (A) bilateral cervicothoracic CSF leaks without an associated meningeal diverticulum; B, Left thoracic meningeal diverticulum.

Bony cochlear nerve canal atresia in a patient with CND

SWI data in a patient with progressive MS exquisitely demonstrate the location of iron deposition in the deep gray matter. SWI data in a patient with progressive.

Involvement of the frontal and parietal lobes in patients with isolated cortical hyperintensities. Involvement of the frontal and parietal lobes in patients.

T2-weighted, PD-weighted, FLAIR, and DWI images showing cortical abnormalities in the right parietal lobe; FLAIR and DWI also show abnormalities in the.

Type 1 pedicle marrow signal intensity changes associated with degenerative facet disease. Type 1 pedicle marrow signal intensity changes associated with.

Myelograms demonstrate small dorsal and ventral extradural filling defects but normal delineation of nerve roots, indicating no subarachnoid abnormality.A,

A 58-year-old woman with left-sided weakness.

A–C, DWI scan (A) shows acute infarction involving the left cerebellar hemisphere, which appears iso- to hyperintense on the b0 EPI scan (B). A–C, DWI.

Midline (A) and parasagittal (B) non-contrast-enhanced T1-weighted MR images (500/11/1) in a 73-year-old healthy woman show the normal high signal intensity.

A 7-day old neonate, the older sister of patient 1, also presented with neonatal encephalopathy.Axial fast spin-echo T2-weighted image (130/4200/1[TE/TR/NEX])

Case 4: 74-year-old man with sudden left paresthesia.

Graph of neurologic scores (mean ± SD) for the moderate-severe VSPdelayed group, mild VSPdelayed group, and sham group. Graph of neurologic scores (mean.

Signal characteristics of PML

MR spectrum of a normal frontal lobe obtained at 1

Boxplots and value distribution of Ktrans values in the ASPECTS regions. Boxplots and value distribution of Ktrans values in the ASPECTS regions. A, Boxplots.

T2-weighted MR imaging appearance of a healthy 60-year-old woman (A), a 66-year-old woman with idiopathic Parkinson disease (B), and a 16-year-old female.

A 61-year-old male patient with right hemiparesis imaged at 2

Follow-up prenatal MR imaging at 36 weeks’ gestation.

Differentiation of common pediatric brain tumors by quantitative 1H-MR spectroscopy. Differentiation of common pediatric brain tumors by quantitative 1H-MR.

1, Axial T2 image in patient 1 demonstrates bilateral cystic spaces in the biparietal periventricular white matter. 2, Axial T2 image in patient 2 demonstrating.

Boxplots of Ktrans values of HT and non-HT regions and the receiver operating characteristic curve. Boxplots of Ktrans values of HT and non-HT regions.

Bone algorithm CT images from the same case, demonstrating focal enlargement of the right tympanic segment, in the axial (left) and coronal (right) planes.

Multiple microbleeds in CAA

Sagittal T1-weighted MR image of the pituitary gland in a term neonate (born at gestational week 38) obtained near term (corrected age of 39 weeks; 7 days.

A, Sagittal T1-weighted image demonstrates a mildly hypointense well-defined mass arising from the posterior aspect of the tongue abutting the inferior.

A, Inappropriate venous region-of-interest selection resulting in the CBV appearance mimicking global hypoperfusion. A, Inappropriate venous region-of-interest.

MR images of the brain (axial sections, fluid-attenuated reversion recovery sequences) show the symmetric hyperintensities (arrows) involving the pyramidal.

Multiple regions of interest are used with the FACT algorithm to delineate the corticospinal tract. Multiple regions of interest are used with the FACT.

A–C, DWI scan (A) shows acute (hyperintense) infarction in the left frontal region. A–C, DWI scan (A) shows acute (hyperintense) infarction in the left.

Case 2. Case 2. Selected proton MR spectra (PRESS, 1500/136/1; nominal voxel size, 2 cm3) from the voxels indicated on the scout spin-echo T2-weighted.

Axial T2-weighted image (A) demonstrates focal cortical dysplasia (arrow) centered in the left anterior temporal lobe in a right-handed patient. Axial.

Schematic (A) and radiographic measurement (B) of pelvic incidence: an angle between a line drawn perpendicular to the middle of the superior sacral endplate.

A, Axial T2-weighted image (3500/90/2) shows a well-defined deep right occipital white matter lesion (asterisk) and a subcortical linear hyperintensity.

Axial T2-weighted MR image shows normal flow void in the right internal jugular vein (arrows), whereas flow-related enhancement can be seen in the left.

Case 6: 61-year-old man with sudden right crural hemiparesis.

Bar graph illustrating the rate of leak detection by CTM and MRM

Low-grade astrocytoma and anaplastic astrocytoma.

Globally increased ASL signal intensity due to artifact.

Scatterplots displaying the relationship between FA and age (A).

A, Axial T1- weighted MR image shows a predominantly isointense lesion in the right parietal bone. A, Axial T1- weighted MR image shows a predominantly.

Plot of the regional homogeneity index among the CID-NI, CID-MCI, and NC groups in the identified brain regions (voxels at least 60, P < .001). a, The.

A–C, Axial T2-weighted images 7 days after the ictus, demonstrating punctate hyperintensities throughout the white matter, on a background of slightly.

In another infant with a left-sided BPL paralysis following birth trauma, there is only hyperintensity of the left BPL on the coronal STIR T2-weighted.

Two sample cases of z score maps with and without modulation from patients with AD. Automated voxel-by-voxel z score analysis was performed by comparison.

A–C, Single-voxel proton spectra from a normal-appearing cerebellar volume (A, patient 12), a normal-appearing parieto-occipital white matter volume (B,

A, Setting code for the Sophysa Sophy SM8 valve.

MRN appearance of a normal sciatic nerve.

Highly specific connections between the cortical lobe and thalamus.

Left, T1 spin-echo image at 1

Boxplot of each etiologic subgroup with the percentage ADC reduction of affected regions compared with NAWM. ATL from carbon monoxide (CO, a small subgroup.

Presentation transcript:

Single voxel spectroscopy. Single voxel spectroscopy. Localized STEAM (TE 20) spectra were acquired from the normal appearing right periatrial region (A1) and from the hyperintense left periatrial region (B1). PRESS (TE 135) spectra were acquired from the same locations (A2 and B2, respectively). The right and left STEAM spectra are displayed by using the same vertical scale factor, as are the right and left PRESS spectra. Efrat Saraf-Lavi et al. AJNR Am J Neuroradiol 2003;24:946-951 ©2003 by American Society of Neuroradiology