Data from: Investigation of parallel radiofrequency transmission for the reduction of heating in long conductive leads in 3 tesla magnetic resonance imaging

Axial Image with 4-element PTX coil in suppression modeAxial slice through center of phantom obtained with GRE sequence (TR = 2000 ms, TE = 40 ms, slice thickness = 10 mm, in-plane resolution = 256x256, FOV = 24 cm) with 4-Element PTX operating in suppression mode (phase shifts of 40, 16, 200 and 301 degrees). Dicom file for image shown in manuscript.AxialGREwPTX.dcmCoil GeometryContains specs about the geometry of the coil configurations (including capacitance values) for the simulations.CoilGeometry.txtBirdcage HeatingTemperature probe measurements for heating at tip of wire 12 cm long copper wire in a polyacrylic acid cylindrical phantom (radius = 9 cm, height = 24 cm) using FRFSE sequence (TR = 559 ms, TE = 100 ms, echo train length = 24, 1 slice, imaging time = 4:08). Excitation with transmit/receive GE birdcage coil with transmit gain of 153.PTx Quadrature HeatingTemperature probe measurements for heating at tip of wire 12 cm long copper wire in a polyacrylic acid cylindrical phantom (radius = 9 cm, height = 24 cm) using FRFSE sequence (TR = 559 ms, TE = 100 ms, echo train length = 24, 1 slice, imaging time = 4:08). Excitation with 4-element parallel transmit coil with phase shifts of 0, 90, 180 and 270 degrees between elements with transmit gain of 195PTx Quad Heating Test 1 TX195.txtPTx Suppression Heating Test 1Temperature probe measurements for heating at tip of wire 12 cm long copper wire in a polyacrylic acid cylindrical phantom (radius = 9 cm, height = 24 cm) using FRFSE sequence (TR = 559 ms, TE = 100 ms, echo train length = 24, 1 slice, imaging time = 4:08). Excitation with 4-element parallel transmit coil with phase shifts of 40, 16, 200 and 301 degrees (suppression mode) with a transmit gain of 190PTx Suppression Heating Test 2Temperature probe measurements for heating at tip of wire 12 cm long copper wire in a polyacrylic acid cylindrical phantom (radius = 9 cm, height = 24 cm) using FRFSE sequence (TR = 559 ms, TE = 100 ms, echo train length = 24, 1 slice, imaging time = 4:08). Excitation with 4-element parallel transmit coil with phase shifts of 40, 16, 200 and 301 degrees (suppression mode) with a transmit gain of 187. Second measurement.E-field increase as function of wire positionFolder containing two files with % increase in E-field magnitude at tip of wire vs minimum in field of view for varying radial position (RposRatio.csv) and z position (ZposRatio.csv)WirePos.zipSimulation data for wire at r = 2.5 cm, z = 0 cm (E-field and H-field)Contains simulation data for wire positions r = 2.5 cm, z = 0 cm. Includes data for a 16-rung birdcage coil operating in quadrature mode and a 2-element PTX coil, 4-element PTX coil and 8-element PTX operating in suppression mode (amplitudes and phases found in manuscript). Each folder contains a folder named 'XY plane' corresponding to data in the z = 0 cm plane, x = -10 cm to x = 10 cm, y = -10 cm to 10 cm and 'YZ plane' corresponding to data in the x = 0 cm plane, z = -12 cm to 1 cm, y = -10 cm to 10 cm. Each file is named: _.txt. The files are space delimited. Header of 15 lines.Leadat25mm.zipSimulation data for wire at r = 8 cm, z = 2 cm (E-field and H-field)Contains simulation data for wire positions r = 8 cm, z = 2 cm. Includes data for a 16-rung birdcage coil operating in quadrature mode and a 2-element PTX coil, 4-element PTX coil and 8-element PTX operating in suppression mode (amplitudes and phases found in manuscript). Each folder contains a folder named 'XY plane' corresponding to data in the z = 0 cm plane, x = -10 cm to x = 10 cm, y = -10 cm to 10 cm and 'YZ plane' corresponding to data in the x = 0 cm plane, z = -12 cm to 1 cm, y = -10 cm to 10 cm. Each file is named: _.txt. The files are space delimited. Header of 15 linesLeadat80mmz2cm.zipSimulation data for wire at r = 7.5 cm, z = 0 cm (E-field and H-field)Contains simulation data for wire positions r = 7.5 cm, z = 0 cm. Includes data for a 16-rung birdcage coil operating in quadrature mode and a 2-element PTX coil, 4-element PTX coil and 8-element PTX operating in suppression mode (amplitudes and phases found in manuscript). Each folder contains a folder named 'XY plane' corresponding to data in the z = 0 cm plane, x = -10 cm to x = 10 cm, y = -10 cm to 10 cm and 'YZ plane' corresponding to data in the x = 0 cm plane, z = -12 cm to 1 cm, y = -10 cm to 10 cm. Each file is named: _.txt. The files are space delimited. Header of 15 linesLeatat75mm.zip### 抑制模式下4通道并行发射（PTX）线圈采集的轴位图像 采用梯度回波（Gradient Recalled Echo, GRE）序列获取体模中心层面的轴位图像，采集参数：重复时间（TR）=2000ms，回波时间（TE）=40ms，层厚=10mm，面内分辨率=256×256，视野（Field of View, FOV）=24cm；使用工作于抑制模式的4通道PTX线圈，各通道相移分别为40°、16°、200°和301°。本文稿件展示图像对应的DICOM格式文件为`AxialGREwPTX.dcm`。 ### 线圈几何参数 包含仿真所用线圈构型的几何规格（含电容参数），对应数据文件为`CoilGeometry.txt`。 ### 鸟笼线圈加热测试 采用快速恢复快速自旋回波（Fast Recovery Fast Spin Echo, FRFSE）序列，在聚丙烯酸圆柱形体模（半径=9cm，高度=24cm）中对12cm长铜线尖端进行加热温度探头测量，序列参数：TR=559ms，TE=100ms，回波链长度=24，单层面成像，成像时长=4分08秒。采用发射/接收式GE鸟笼线圈激发，发射增益为153。 ### PTX正交模式加热测试 采用FRFSE序列，在与前述一致的聚丙烯酸圆柱形体模中对12cm长铜线尖端进行加热温度探头测量，序列参数同上。采用4通道并行发射线圈激发，各通道间相移分别为0°、90°、180°和270°，发射增益为195，对应数据文件为`PTx Quad Heating Test 1 TX195.txt`。 ### PTX抑制模式加热测试1 采用FRFSE序列，在相同体模中对12cm长铜线尖端进行加热温度探头测量，序列参数同上。采用工作于抑制模式的4通道并行发射线圈激发，各通道相移为40°、16°、200°和301°，发射增益为190。 ### PTX抑制模式加热测试2 测试场景与测试1一致，采用相同FRFSE序列与体模，使用抑制模式下的4通道并行发射线圈激发，相移参数同上，发射增益为187，为第二次重复测量。 ### 电场增强随导线位置的变化 包含两个数据文件的数据集，分别对应不同径向位置（`RposRatio.csv`）和轴向位置（`ZposRatio.csv`）下，铜线尖端电场强度相较于视野内最小值的增幅百分比，压缩包为`WirePos.zip`。 ### 导线位于r=2.5cm、z=0cm位置的仿真数据（电场与磁场） 包含导线位置为r=2.5cm、z=0cm的电场与磁场仿真数据，涵盖以下线圈的仿真结果：工作于正交模式的16阶鸟笼线圈，以及工作于抑制模式的2通道PTX线圈、4通道PTX线圈和8通道PTX线圈（线圈幅度与相位参数详见本文稿件）。每个子文件夹包含两个子目录：`XY平面`，对应z=0cm平面的数据，扫描范围x=-10cm至10cm、y=-10cm至10cm；`YZ平面`，对应x=0cm平面的数据，扫描范围z=-12cm至1cm、y=-10cm至10cm。所有数据文件均以`_.txt`命名，采用空格分隔格式，文件头部包含15行注释头，对应压缩包为`Leadat25mm.zip`。 ### 导线位于r=8cm、z=2cm位置的仿真数据（电场与磁场） 包含导线位置为r=8cm、z=2cm的电磁场仿真数据，线圈类型、参数及数据组织格式与前述一致，对应压缩包为`Leadat80mmz2cm.zip`。 ### 导线位于r=7.5cm、z=0cm位置的仿真数据（电场与磁场） 包含导线位置为r=7.5cm、z=0cm的电磁场仿真数据，线圈类型、参数及数据组织格式与前述一致，对应压缩包为`Leadat75mm.zip`、`Leatat75mm.zip`。