We demonstrate the capabilities of a highly parallel, active pixel detector for large-area, mass spectrometric imaging of biological tissue sections. A bare Timepix assembly (512 × 512 pixels) is combined with chevron microchannel plates on an ion microscope matrix-assisted laser desorption time-of-flight mass spectrometer (MALDI TOF-MS). The detector assembly registers position- and time-resolved images of multiple m/z species in every measurement frame. We prove the applicability of the detection system to biomolecular mass spectrometry imaging on biologically relevant samples by mass-resolved images from Timepix measurements of a peptide–grid benchmark sample and mouse testis tissue slices. Mass-spectral and localization information of analytes at physiologic concentrations are measured in MALDI-TOF-MS imaging experiments. We show a high spatial resolution (pixel size down to 740 × 740 nm2 on the sample surface) and a spatial resolving power of 6 μm with a microscope mode laser field of view of 100–335 μm. Automated, large-area imaging is demonstrated and the Timepix’ potential for fast, large-area image acquisition is highlighted.
Biological Tissue Imaging with a Position and Time Sensitive Pixelated Detector
J. Jungmann,Donald F. Smith,L. MacAleese,I. Klinkert,J. Visser,R. Heeren
Published 2012 in Journal of the American Society for Mass Spectrometry
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- Publication year
2012
- Venue
Journal of the American Society for Mass Spectrometry
- Publication date
2012-07-27
- Fields of study
Biology, Physics, Chemistry, Engineering, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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