| Title: |
Cryo-Imaging and Software Platform for Analysis of Molecular MR Imaging of Micrometastases. |
| Authors: |
Qutaish, Mohammed Q., Zhou, Zhuxian, Prabhu, David, Liu, Yiqiao, Busso, Mallory R., Izadnegahdar, Donna, Gargesha, Madhusudhana, Lu, Hong, Lu, Zheng-Rong, Wilson, David L. |
| Source: |
International Journal of Biomedical Imaging; 4/1/2018, p1-16, 16p |
| Subject Terms: |
MICROMETASTASIS, ANIMAL experimentation, COMPUTER software, EXPERIMENTAL design, INFLAMMATION, MAGNETIC resonance imaging, MICE, NECROSIS, RESEARCH evaluation, FLUORESCENT dyes, DIAGNOSIS, THERAPEUTICS |
| Abstract: |
We created and evaluated a preclinical, multimodality imaging, and software platform to assess molecular imaging of small metastases. This included experimental methods (e.g., GFP-labeled tumor and high resolution multispectral cryo-imaging), nonrigid image registration, and interactive visualization of imaging agent targeting. We describe technological details earlier applied to GFP-labeled metastatic tumor targeting by molecular MR (CREKA-Gd) and red fluorescent (CREKA-Cy5) imaging agents. Optimized nonrigid cryo-MRI registration enabled nonambiguous association of MR signals to GFP tumors. Interactive visualization of out-of-RAM volumetric image data allowed one to zoom to a GFP-labeled micrometastasis, determine its anatomical location from color cryo-images, and establish the presence/absence of targeted CREKA-Gd and CREKA-Cy5. In a mouse with >160 GFP-labeled tumors, we determined that in the MR images every tumor in the lung >0.3 mm2 had visible signal and that some metastases as small as 0.1 mm2 were also visible. More tumors were visible in CREKA-Cy5 than in CREKA-Gd MRI. Tape transfer method and nonrigid registration allowed accurate (<11 μm error) registration of whole mouse histology to corresponding cryo-images. Histology showed inflammation and necrotic regions not labeled by imaging agents. This mouse-to-cells multiscale and multimodality platform should uniquely enable more informative and accurate studies of metastatic cancer imaging and therapy. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
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