Glenn joined the Mallinckrodt Institute of Radiology in 1993 as a Medical Physicist. Prior to that, he was a faculty member in the Department of Physics at Texas Tech University and at The University of Texas at Arlington. He was trained by Michel ter Pogossian and was certified as a Diagnostic Medical Physicist by the American Board of Radiology in 1999.

Image quality and dose reduction in diagnostic imaging.

1. Jiang CG, Fletcher G, Fry JL, and Papaconstantopoulous DA: Calculation of the superconducting parameter <I2> for HCP transition metals. Physical Review, B44:2268-2275, 1991.
2. Fletcher G: A mechanical analog of first- and second-order phase transitions. American Journal of Physics, 65:74-81, 1997.
3. Hildebolt CF, Fletcher G, Yokoyama-Crothers N, Conover GL, Vannier MW: A comparison of the response of storage phosphor and film radiography to small variation in X-ray exposure. Dento Maxillo Facial Radiology 26:147-151, 1997.
4. Hildebolt CF, Pilgram TK, Yokoyama-Crothers N, Fletcher G, Helbig JL, Bartlett TQ, Gravier M, Vannier MW, Shrout MK. Reliability of linear alveolar bone loss measurements of mandibular posterior teeth from digitized bitewing radiographs. Journal of Clinical Periodontology, 25:850-856, 1998.

1. Fletcher G: Introduction to Mathematical Methods in Physics. Wm. C. Brown Publishers, Dubuque, Iowa, 1994.