Simulated (lines) and experimental (dots) dependencies of the measured MPF on the SNR in source images expressed as functions of the reference image SNR.

Slides:



Advertisements
Similar presentations
Top row, Images from a coronally oriented cine CT scan of the rabbit brain from the level of the pons (section 1) to the parieto-occipital cerebrum (section.
Advertisements

An example of improving the SNR of arterial spin-labeling MR imaging using deep learning. An example of improving the SNR of arterial spin-labeling MR.
Demonstration of the creation of a patient-specific brain mold for minimizing tissue distortion during fixation. Demonstration of the creation of a patient-specific.
Sample source images (MT-weighted [MT-w], reference without saturation, T1-weighted [T1-w], and proton density–weighted [PD-w]) and a reconstructed MPF.
A 61-year-old man with brain metastases from primary lung cancer.
A, Measurement of the angle between the TS-OP line and the hard palate in the lateral scout view of the brain CT (black arrow). A, Measurement of the angle.
Normalized and averaged images of rGMC and I-123 iomazenil BP
A–D, Whole-brain MD (A) and FA (B) histograms in a patient with low (n = 2) visual score of LA (continuous line), as shown by corresponding FLAIR images.
Contrast-enhanced coronal CT scan of a rabbit.
An example of improving the SNR of arterial spin-labeling MR imaging using deep learning. An example of improving the SNR of arterial spin-labeling MR.
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.
Patient 3, a 72-year-old woman with histopathologically proved CAA and a large hyperacute right frontal intracerebral macrohemorrhage (thick arrows). Patient.
Results of the PE tubes phantom experiments.
A side-by-side comparison of EPVS in a cognitively healthy control versus a patient with aMCI A, A coronal MR brain image of a cognitively healthy control.
42-year-old male patient with follow-up neck CT for lymphoma at 70 kVp (A) and corresponding previous CT at 120 kVp (B). 42-year-old male patient with.
Box-and-whisker plot of attenuation measurements with DE and SECT
Pictorial depiction of the phase-masking process.
Results of the improved processing methodology.
CT perfusion maps of MTT
A, Plots showing the signal-intensity behavior as a function of flip angle for gray matter (GM) and white matter (WM) at field strengths 1.5T and 3T. A,
Representative case with region of interest on globus pallidus (arrow)
Axial CT image (A) in a patient with behavioral variant frontotemporal dementia shows a marked frontal atrophy, and axial perfusion SPECT images (B) show.
T2-weighted images of a patient with an infarction within the anterior MCA branch territory on day 5 (patient 15) show high SI changes within the ipsilateral.
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.
Coronal MIP images of the thoracolumbar spine region acquired before (left) and after (right) administration of liposomal-Gd. Coronal MIP images of the.
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.
MR images of patient 2 (with juvenile-onset DRPLA).
Bland-Altman plots showing intraobserver variability of sTBF measurements for observers 1 (A and C) and 2 (B and D) with maximum (A and B) and average.
Images of a 37-year-old man who was a pedestrian in a traffic accident in January 1992; he was hit by an automobile while under the influence of alcohol.
Coronal and axial sketches of the medulla, which correspond to the medullary regions seen on the T2-weighted axial images in Fig 1, demonstrate the anatomical.
An infant born at a gestational age of 40+4 weeks with cesarean delivery for fetal distress who had an Apgar score of 0–4–5. An infant born at a gestational.
Representative multislice MIP projections of EPVS in the subcortical brain structures and the basal ganglia of a control and a subject with aMCI. Representative.
MR spectrum of a normal frontal lobe obtained at 1
Fluoroscopic spot films taken during the PMMA injection in a 65-year-old woman with bilateral sacral insufficiency fractures.A, Frontal projection allows.
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.
Images illustrate the contour and thresholding technique
Orbital amyloidoma in a 32-year old woman with a slowly increasing mass in the right orbit and generalized bone pain. Orbital amyloidoma in a 32-year old.
Coronal T1-weighted contrast-enhanced MR image obtained in January of 1999 at the onset of right hearing impairment shows increased enhancement of the.
Differentiation of common pediatric brain tumors by quantitative 1H-MR spectroscopy. Differentiation of common pediatric brain tumors by quantitative 1H-MR.
Linear regression analysis to test for correlation of the OsR and NR with FD parameters, MCR (%) (A and C) and pore density (1/mm2) (B and D). Linear regression.
Maximum intensity projection of a time-of-flight angiography (TR, 28 ms; TE, 4.92 ms; matrix, 704 × 576; FOV, 163 × 200 mm2; 92 sections; section thickness,
Axial images of a 45-year-old woman (A and C) from the STD group (DLP, 1100 mGy×cm) and a 37-year-old man (B and D) from the LD group (DLP, 713 mGy×cm)
Axial CT images at the centrum semiovale level show a small left frontal hemorrhage corresponding to shear injury. Axial CT images at the centrum semiovale.
Axial head CT image across the centrum semiovale before (baseline image) and after (enhanced image) processing with CIE, with equivalent ROIs used to measure.
A–C, FLAIR (TR/TE, 9002/149. 5), DWI (10000/105
MR images of the brain (axial sections, fluid-attenuated reversion recovery sequences) show the symmetric hyperintensities (arrows) involving the pyramidal.
Sample energy-integrating detector and photon-counting detector images of a 67-year-old man (section thickness, 2 mm; increment, 2 mm; window center, 45.
Relationships between number and site of traumatic microbleeds and clinical and imaging parameters. Relationships between number and site of traumatic.
Automatic exposure control in the head of a pediatric patient.
Scatter and box plot of midpoint measurement compared with age of subject. Scatter and box plot of midpoint measurement compared with age of subject. The.
Longitudinal T1-weighted spin-echo signal-intensity changes in the DN (A–C) and GP (D–F) in a female patient with MS after receiving 0 (A and D), 1 (B.
Typical images of a patient without brain metastases derived via automatic segmentation software. Typical images of a patient without brain metastases.
A, Postcontrast T1-weighted MR image of the brain during metastatic work-up demonstrates no metastatic disease. A, Postcontrast T1-weighted MR image of.
Brain MR imaging on DOL 2 in patient 5 while he was treated with induced hypothermia; comparison between the perfusion map and images obtained from conventional.
Brain MR imaging on DOL 2 in patient 8, while he was treated with induced hypothermia; comparison between the perfusion map and images obtained from conventional.
Imaging plane for arterial spin labeling method.
Brain stem lesions on MR images and abnormal respiration.
Signal intensity time curves of gradient-echo (GRE) and spin-echo (SE) echo-planar imaging sequences. Signal intensity time curves of gradient-echo (GRE)
Globally increased ASL signal intensity due to artifact.
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.
Plots of the difference between sonography and MR imaging ventricular measurements against the time interval between sonography and MR imaging. Plots of.
MR imaging−based modalities in neuroimaging research discussed in this review. MR imaging−based modalities in neuroimaging research discussed in this review.
Persistent diffusion abnormalities in the brain stem of patient 2.
Tubulo-nodular type. Tubulo-nodular type. Fetal MR images (case 4). A, Mid-sagittal view turbo spin-echo T1-weighted sequence (400/17/1) shows typical.
The ASPECTS system scores arteries distal to the occlusion (0, artery not seen; 1, less prominent; 2, equal or more prominent compared with a matching.
FIG 4. Plots of the Loes scores, based on double-echo spin-echo MR images, obtained at different follow-up examinations for 22 patients with ALD. The T1-weighted.
Visible atrophic changes after moderate TBI
Left, T1 spin-echo image at 1
Same section position with spin-echo T1-weighted sequences at 1
Presentation transcript:

Simulated (lines) and experimental (dots) dependencies of the measured MPF on the SNR in source images expressed as functions of the reference image SNR (SNRref) based on the data exemplified in Fig 6. Simulated (lines) and experimental (dots) dependencies of the measured MPF on the SNR in source images expressed as functions of the reference image SNR (SNRref) based on the data exemplified in Fig 6. Simulated plots correspond to the actual MPF and T1 values measured in ROIs for adult frontal WM (MPF = 12.6%, T1 = 750 ms), adult GM in the caudate nucleus (MPF = 7.0%, T1 = 1230 ms), fetal brain stem (MPF = 4.5%, T1 = 1520 ms), and fetal frontal WM (MPF = 2.0%, T1 = 2340 ms). Adult MPF and SNR measurements were obtained from the datasets acquired with the receiver bandwidths of 868, 434, 217, and 109 Hz/pixel. Fetal measurements were obtained from the datasets containing 1, 2, and 3 averaged blocks of source images. V.L. Yarnykh et al. AJNR Am J Neuroradiol 2018;39:1341-1348 ©2018 by American Society of Neuroradiology