By Jessica J. Burchard, The Winchester StarrnrnDiagnostic medicine has changed considerably during the past 28 years, and at Winchester Medical Center it’s also become much more convenient.rnrnWhen Brenda Matthews came to WMC in 1981, she and others working in diagnostic medicine would have to travel across the hospital campus for most of the services they needed. The radiology department was isolated in the geographic center of the hospital (an area with no windows) while other diagnostic services were spread out across the campus. But now all of those services are in a single building, the Winchester Medical Center Diagnostic Center, which officially opens Monday at 1840 Amherst St.rnrn”This will help people be able to come in and get what they need in one place