Metabonomic studies of pancreatic cancer response to radiotherapy in a mouse xenograft model using magnetic resonance spectroscopy and principal components analysis

Figure 2 High-resolution magic angle spinning proton magnetic resonance spectroscopy spectra of normal pancreas and transplanted pancreatic tumor (500 mHz). A: Normal pancreas (a); Transplanted pancreatic tumor (b); Amplified data from spectra region δ3.30-3.15 (c); Amplified data from spectra region δ3.15-3.48 (d). For peak assignments, see list of abbreviations used; B: Principal Component Analysis to compare the metabolic profiles between normal pancreas and pancreatic cancer based on the high-resolution magic angle spinning proton magnetic resonance spectroscopy spectra. Panels (a) and (b) are score and loading plots. ❍: Normal pancreas; ∆: Pancreatic cancer.