对临床前心脏PET/MR使用H/23Na表面线圈进行预计算减弱校正图的评估
Hanan Rida1, Mona Guetlin1,2, Mikael Naveau3
1Cyceron UR4650 PSIR, Université Caen Normandie, GIP Cyceron, Campus Jules Horowitz, bvd Henri Becquerel, BP 5229, 14074, Caen, France.
EJNMMI physics
|January 20, 2026
概括
对于临床前PET/MR成像,一个新的3D打印的带有表面线圈的摇篮可以提供与传统系统相比较的18F-FDG PET结果. 这种方法可以在使用表面线圈进行X核成像时准确量化PET.
科学领域:
- 临床前的PET/MR成像技术
- 核医学是一种核医学.
- 医学物理 医学物理
背景情况:
- 临床前PET/MR减弱校正 (AC) 通常使用体积线圈和细分的MR数据.
- 对于X核的高灵敏度表面线圈 (例如23Na,31P) 可能会损害PET量化准确性.
- 这项研究研究了一种新的方法,使用专门的摇篮和表面线圈来改善PET/MR AC.
研究的目的:
- 为了评估3D打印的摇篮与嵌入的表面线圈对18F-FDG PET成像质量的影响.
- 为了比较使用新摇篮与传统设置的PET量化准确性.
- 评估使用该系统用于PET和X核核MR成像的可行性.
主要方法:
- 开发了一个3D打印的摇篮 (DC) 容纳一个20毫米表面线圈.
- 创建了一个基于CT的衰减图集成到PET重建中.
- 在幻影中比较图像质量指标 (RC,%STD,SOR) 和在老鼠中的心脏18F-FDG PET图像与具有体积线圈的常规摇篮 (CC) 相比.
主要成果:
- 恢复系数 (RC) 在DC和CC之间相似.
- 电流显示显著增加了统一性 (%STD) 和降低了对比度和噪声比率 (CNR).
- 活体内心脏标准化吸收值在两个摇篮之间是可比的,没有显著差异.
结论:
- 预先计算的衰减图与标准化的MR表面线圈定位产生与传统体积线圈系统相比较的PET图像.
- 这种方法支持在使用表面线圈的临床前研究中精确量化PET.
- 这种方法适用于PET和X核MRI成像的组合.
相关概念视频
Transcription Attenuation in Prokaryotes
18.2K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
18.2K
Distance Corrections
283
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
283
Power Factor Correction
504
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
504
NMR Spectrometers: Resolution and Error Correction
1.0K
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
1.0K
Preclinical Development: Overview
5.9K
Preclinical development consists of a series of tests that ensure the safety and efficacy of a new therapeutic compound before it is tested in humans. There are four main phases to this process. First, safety pharmacology tests are conducted to ensure the drug does not produce any acutely harmful effects. These tests examine parameters such as bronchoconstriction, cardiac dysrhythmias, blood pressure changes, and ataxia. Next, preliminary toxicological testing is performed to determine the...
5.9K
Surface Tension and Surface Energy
3.2K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.2K


