In its shortest form, it measures 12.5 by 4.25 inches (LW), which is about average. It's a solid stick, with little else to set it apart from the competition.Įxtending up to 38.5 inches from the base of the handle to the tip of the adjustable, telescopic aluminum arm, the iSnap Pro is one of the longer selfie sticks I've tested. The $29.99 Mpow iSnap Pro features a grooved design that prevent its telescopic arm from twisting. There's not much to differentiate selfie sticks from one to the next, so even subtle details help. Same arm design and materials that caused minor injury with a similar selfie stick we tested.How to Set Up Two-Factor Authentication.How to Record the Screen on Your Windows PC or Mac.How to Convert YouTube Videos to MP3 Files.How to Save Money on Your Cell Phone Bill.How to Free Up Space on Your iPhone or iPad.How to Block Robotexts and Spam Messages.Any queries (other than missing content) should be directed to the corresponding author for the article. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. TABLE S2 KWIC reconstruction parameters for different iSNAP image contrasts TABLE S1 Sequences parameters of iSNAP and the reference sequences B1 field correction was not performed in the current T1 estimation It is worth noting that due to the limited maximum TI in iSNAP, the estimated T1 values for long-T1 tissue (eg, CSF) may be less reliable. iSNAP-MRA shows longer distal arteries than the other twoįIGURE S3 Whole brain T1 map generated from the raw multiple-TI images of iSNAP-dMRA with a temporal solution of 200 ms on patient P1. iSNAP-MRA and iSNAP-dMRA by temporal resolution of 200 ms have higher SNR than the iSNAP-dMRA by temporal resolution of 100 ms. A 112-mm-thick slab was used for projection. The right panel is the iSNAP-dMRA frame reconstructed at a TI of 699.1 ms with a temporal resolution of 200 ms. The middle panel is the iSNAP-dMRA frame reconstructed at a TI of 748.5 ms with a temporal resolution of 100 ms. The iSNAP-MRA (left) was reconstructed at a TI of 699.1 ms. The patients had a larger bolus delay from ICA to MCA as compared to the healthy volunteers, which may be due to slower blood flow in the patientsįIGURE S2 Example iSNAP-MRA and iSNAP-dMRA frames reconstructed at similar TIs in healthy subject H1. 4D-TRANCE was scanned only on the healthy subjects. The iSNAP-dMRA images were reconstructed with two different temporal resolutions, ie, 100 ms and 200 ms. Each panel corresponds to a subject, the top rows are from the healthy subjects H1-H3, while the bottom rows are from the patients P1-P3 who had cervical and cerebral atherosclerotic diseases. Mrm2843-Supinfo.docxWord document, 3.3 MBįIGURE S1 Dynamic MRA (dMRA) time-intensity curves obtained from a pixel in the internal carotid artery (ICA) and a pixel in the M1 segment of the ipsilateral middle cerebral artery. ISNAP provides a time-efficient evaluation of intracranial arteries and may have great potential for comprehensive assessment of intracranial vascular conditions using a single sequence. Depiction of vessel wall lesions in iSNAP vessel wall images is better than SNAP and may be similar to T 1-weighted VISTA, although the images are slightly blurred. The 2 types of iSNAP static MRA images complement each other in characterizing both proximal large arteries and distal small arteries. iSNAP-dynamic MRA yields similar dynamic flow information as 4D-TRANCE and allows more flexible temporal resolution. The dedicated reconstruction strategies are feasible for each iSNAP image contrast and beneficial for image SNR. ISNAP has whole-brain coverage and takes ~6.5 min. Preliminary comparison of iSNAP against the dedicated dynamic MRA sequence 4D-TRANCE, MRA/vessel wall imaging sequence SNAP, and vessel wall imaging sequence T 1-weighted VISTA was performed in healthy volunteers and patients. A T 1-weighted brain MRI was also reconstructed from iSNAP. Dynamic MRA for blood flow assessment was obtained from iSNAP by reconstruction at multiple inversion times and image subtraction, static MRA by both image subtraction approach and phase-sensitive inversion recovery technique, and vessel wall images by both reconstruction at zero-crossing time-point of blood and phase-sensitive inversion recovery. Images were reconstructed by k-space weighted image contrast (KWIC) method with optimized data-sharing strategies. ISNAP consists of pulsed arterial spin labeling preparations and 3D golden angle radial acquisition. To propose a highly time-efficient imaging technique named improved simultaneous noncontrast angiography and intraplaque hemorrhage (iSNAP) for simultaneous assessment of lumen, vessel wall, and blood flow in intracranial arteries.
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