(19)

(11)

EP 1 257 789 A2

(12)

(88) Date of publication A3: 07.03.2002 (43) Date of publication: 20.11.2002 Bulletin 2002/47 (21) Application number: 00992822.7 (22) Date of filing: 30.11.2000

(51) International Patent Classification (IPC)7: G01F 1/00 (86) International application number: PCT/US0042/395 (87) International publication number: WO 0104/2744 (14.06.2001 Gazette 2001/24)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 30.11.1999 US 168203 P (71) Applicant: QRS Diagnostic, LLC Plymouth, MN 55447 (US)	(72) Inventors: HAMILTON, Douglas, L. Plymouth, MN 55447 (US) LICHTER, Patrick, A. Plymouth, MN 55447 (US) (74) Representative: Charig, Raymond Julian  Eric Potter Clarkson,Park View House,58 The Ropewalk Nottingham NG1 5DD Nottingham NG1 5DD (GB)