2024年2月20日 · PETRA—Pointwise Encoding Time reduction with Radial Acquisition—is a MR imaging sequence designed to reach the shortest possible encoding times on any scanner. In …

In pointwise encoding time reduction with radial acquisition (PETRA), outer k-space is filled with radial half-projections, whereas the centre is measured single pointwise on a Cartesian …

2011年6月30日 · Sequences with ultrashort echo times enable new applications of MRI, including bone, tendon, ligament, and dental imaging. In this article, a sequence is presented that …

2014年2月28日 · Fifteen patients with intracranial tumors underwent 3 Tesla MRI including inversion-prepared PETRA and MPRAGE. The two sequences had comparable scan times, …

PETRA combines two different sequences, acquiring central k-space in a ‘point­wise’ fashion (one k-space point per repetition), and the rest of k-space with radial trajectories. PETRA stands for …

【ultra-short TEシーケンス；PETRAとは？ ultra-short TEシーケンスは、FID信号をダイレクトにデータ収集するため極端に短いTEでの取得（μsec）が可能です。

2025年2月18日 · This study compared conventional MRI, PETRA images, and combined MR + PETRA images with CT for diagnosing pediatric fractures. PETRA images and combined …

MRI has a potential role in detecting and evaluating pulmonary nodules, demonstrating a high level of sensitivity and a low false positive rate. The PETRA sequence has high sensitivity, …

Pointwise encoding time reduction with radial acquisition（PETRA） PETRAはTEが極めて短いため、乱流による位相分散や金属アーチファクトを最小限に抑えることが可能です。特に脳動 …

Specifically, PETRA has severe specific absorption rate (SAR) and radiofrequency (RF) pulse peak power limitations when using higher bandwidths in human measurements. In this study, …