TSENSE ACCELERATED BILATERAL 3D SPIRAL BREAST IMAGING

TSENSE 加速双边 3D 螺旋乳房成像

• 批准号: 8169832
• 负责人: MIN HAN
• 金额: $ 1.85万
• 依托单位: STANFORD UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-01 至 2011-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8169832
• 关键词: Acceleration; Bilateral; Breast; Computer Retrieval of Information on Scientific Projects Database; Fatty acid glycerol esters; Funding; Grant; Image; Institution; Magnetic Resonance Imaging; Physiologic pulse; Research; Research Personnel; Resolution; Resources; Source; Speed; Time; United States National Institutes of Health

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. PURPOSE: Dynamic contrast breast MRI requires both high temporal and spatial resolution. To increase temporal resolution in bilateral breast imaging which needs to cover two large volumes, we combine rapid 3D spiral imaging and temporal sensitivity-encoding (TSENSE) acceleration. METHODS: A dual-band spectral-spatial pulse was used to excite both breasts for providing robust fat suppression and an independent spatial and spectral profile for each breast volume. The "stack-of-spirals" imaging trajectory was used for a rapid k-space acquisition. We accelerated an imaging speed by applying TSENSE in the slab direction. All even kz-planes are acquired before all odd kz-planes for time frame. The odd and even frames together can be used to estimate coil sensitivity functions. Then sensitivity-encoding (SENSE) can be used to fill in missing planes in both the odd and even sets, to accelerate the frame rate by a factor of two.

这个子项目是许多研究子项目中的一个 由NIH/NCRR资助的中心赠款提供的资源。子项目和 研究者（PI）可能从另一个NIH来源获得了主要资金， 因此可以在其他CRISP条目中表示。所列机构为 研究中心，而研究中心不一定是研究者所在的机构。 目的：动态对比乳腺MRI需要高的时间和空间分辨率。为了提高需要覆盖两个大体积的双侧乳腺成像的时间分辨率，我们将快速3D螺旋成像和时间灵敏度编码（TSENSE）加速相结合。联合收割机。 方法：双波段光谱-空间脉冲用于激励两个乳房，以提供稳健的脂肪抑制和每个乳房体积的独立空间和光谱轮廓。“螺旋堆叠”成像轨迹用于快速k空间采集。我们通过在板方向上应用TSENSE来加快成像速度。 对于时间帧，在所有奇数kz平面之前采集所有偶数kz平面。 奇数帧和偶数帧可以一起用于估计线圈灵敏度函数。 然后，灵敏度编码（SENSE）可以用于填充奇数和偶数集合中的缺失平面，以将帧速率加速两倍。