Presentation is loading. Please wait.

Presentation is loading. Please wait.

Schematic diagram of 4D-CTA imaging techniques.

Published byLogan Welch Modified over 5 years ago

Similar presentations

Presentation on theme: "Schematic diagram of 4D-CTA imaging techniques."— Presentation transcript:

1 Schematic diagram of 4D-CTA imaging techniques.
Schematic diagram of 4D-CTA imaging techniques. The x-axis represents the time domain. The y-axis represents the z-dimension. The light-gray horizontal bar represents the area that needs to be covered in the z-dimension. A, Shuttle mode: the sinus represents continuous table movement back and forth in the z-axis dimension to provide adequate coverage of the region of interest at multiple points in time. Notice that the temporal resolution is a function of the speed of table movement, typically 2–4 seconds depending on coverage. B, Toggling-table technique: the bars represent table repositioning in the z-axis dimension to provide adequate coverage of the region of interest at multiple points in time. Notice that the temporal resolution is a function of the speed of table repositioning, typically 3–4 seconds. C, Volume scanning: complete coverage of the region of interest (horizontal bar) with 1 gantry rotation. Notice that the temporal resolution is a function of the scanning interval settings because each rotation provides full coverage. Volume CT scanning enables (D) continuous volume scanning. Temporal resolution is limited by the gantry rotation speed. H.G.J. Kortman et al. AJNR Am J Neuroradiol 2015;36: ©2015 by American Society of Neuroradiology

Download ppt "Schematic diagram of 4D-CTA imaging techniques."

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.

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.
A 50-year-old man with MD. Axial thin-section CT image shows decreased distance between the vertical limb of the posterior semicircular canal and the posterior.

A 50-year-old man with MD. Axial thin-section CT image shows decreased distance between the vertical limb of the posterior semicircular canal and the posterior.
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.

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.
Graph (box plots) shows primary tumor volumes of oral and maxillary sinus (A) and pharyngeal (B) cancers categorized at T1–T4. Graph (box plots) shows.

Graph (box plots) shows primary tumor volumes of oral and maxillary sinus (A) and pharyngeal (B) cancers categorized at T1–T4. Graph (box plots) shows.
A, CT scan showing disk herniation in the posterolateral part of the L4-L5 disk.B, Transforaminal periradicular infiltration at the L5–S1 level, demonstrating.

A, CT scan showing disk herniation in the posterolateral part of the L4-L5 disk.B, Transforaminal periradicular infiltration at the L5–S1 level, demonstrating.
Coronal (A) and axial (B) noncontrast CT scans of the paranasal sinuses show an air cell within the intersinus septum. Coronal (A) and axial (B) noncontrast.

Coronal (A) and axial (B) noncontrast CT scans of the paranasal sinuses show an air cell within the intersinus septum. Coronal (A) and axial (B) noncontrast.
Axial contrast-enhanced CT scan of the neck demonstrates a hypoattenuated poorly circumscribed right peritonsillar/parapharyngeal masslike lesion, with.

Axial contrast-enhanced CT scan of the neck demonstrates a hypoattenuated poorly circumscribed right peritonsillar/parapharyngeal masslike lesion, with.
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.

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.
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.

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.
A, Brain regions showing a significant increased recruitment on fMRI scans from 10 patients with ALS relative to 10 healthy controls during right-handed.

A, Brain regions showing a significant increased recruitment on fMRI scans from 10 patients with ALS relative to 10 healthy controls during right-handed.
Contrast-enhanced coronal CT scan of a rabbit.

Contrast-enhanced coronal CT scan of a rabbit.
Association between white matter integrity and global neurocognitive impairment. Association between white matter integrity and global neurocognitive impairment.

Association between white matter integrity and global neurocognitive impairment. Association between white matter integrity and global neurocognitive impairment.
MRA, CFD simulation, and 4D-flow MR imaging from subject 2 before and after surgical exclusion of her sigmoid sinus diverticulum, which resulted in resolution.

MRA, CFD simulation, and 4D-flow MR imaging from subject 2 before and after surgical exclusion of her sigmoid sinus diverticulum, which resulted in resolution.
Singular-energy magnitude and location at peak systole in aneurysm volumes (gray) of aneurysm 1, 2, 3, and 5 for 3D PC-MR imaging; CFD with inflow boundary.

Singular-energy magnitude and location at peak systole in aneurysm volumes (gray) of aneurysm 1, 2, 3, and 5 for 3D PC-MR imaging; CFD with inflow boundary.
Diagram illustrates terminal branches of intraparotid facial nerve

Diagram illustrates terminal branches of intraparotid facial nerve
Dose values for 45 patient scans with use of the high-quality protocol

Dose values for 45 patient scans with use of the high-quality protocol
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 schematic diagram of the aortic arch and the great vessels demonstrates the embryologic origins of the arch and its major branches. Normal schematic.
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.

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.
Coronal (A) and axial (B) noncontrast CT scans of the paranasal sinuses show an air cell within the intersinus septum. Coronal (A) and axial (B) noncontrast.

Coronal (A) and axial (B) noncontrast CT scans of the paranasal sinuses show an air cell within the intersinus septum. Coronal (A) and axial (B) noncontrast.
Contrast-enhanced CT scans show increased enhancement at the right cavernous sinus.A, Contrast-enhanced CT scan obtained in 1994 shows that the right tentorium.

Contrast-enhanced CT scans show increased enhancement at the right cavernous sinus.A, Contrast-enhanced CT scan obtained in 1994 shows that the right tentorium.

Similar presentations

Ads by Google