EP 0755219 A1 19970129 - METHOD FOR PERIPROSTHETIC BONE MINERAL DENSITY MEASUREMENT
Title (en)
METHOD FOR PERIPROSTHETIC BONE MINERAL DENSITY MEASUREMENT
Title (de)
VERFAHREN ZUR MESSUNG DES MINERALGEHALTES VON KNOCHENGEWEBE IN DER UMGEBUNG EINER PROTHESE
Title (fr)
PROCEDE DE MESURE DE LA TENEUR D'UN OS EN MINERAUX AUTOUR D'UNE PROTHESE
Publication
Application
Priority
- US 9500950 W 19950213
- US 65501191 A 19910213
Abstract (en)
[origin: WO9625086A1] A method of evaluating bone density around a radiolucent composite prosthesis (27) establishes an implant boundary (118, 124) by fitting a stored template to radio-opaque reference markers (31) embedded in the prosthesis. The implant boundary is used to create a measurement boundary (126) displaced from the implant boundary toward the bone (26) producing a conformal region of interest. Matched histograms (130) of bone density in a lateral and medial region of interest may be displayed to evaluate symmetrical stress defects. Alternatively, bone density may be displayed plotted along an axis (132) cutting across the medial and lateral sides. Fiducial points (100, 102, 104, 106, 108, 110) are identified from the bone and implant morphology to ensure that either display will have a repeatable reference, and hence that such displays will be directly comparable to later and earlier displays thereby aiding in the detection of bone change.
IPC 1-7
IPC 8 full level
A61B 5/00 (2006.01); A61B 6/00 (2006.01); A61F 2/28 (2006.01); A61F 2/46 (2006.01); G01T 1/163 (2006.01); G06T 7/60 (2006.01); A61B 6/03 (2006.01); A61F 2/00 (2006.01); A61F 2/36 (2006.01)
CPC (source: EP)
A61B 6/4035 (2013.01); A61B 6/463 (2013.01); A61B 6/482 (2013.01); A61B 6/505 (2013.01); A61F 2/28 (2013.01); A61F 2/4657 (2013.01); A61F 2/468 (2013.01); G01T 1/163 (2013.01); G06T 7/62 (2016.12); A61B 6/032 (2013.01); A61F 2/367 (2013.01); A61F 2/3676 (2013.01); A61F 2002/3008 (2013.01); A61F 2250/0098 (2013.01); A61F 2310/00011 (2013.01); A61F 2310/00179 (2013.01); G06T 2207/30008 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9625086 A1 19960822; EP 0755219 A1 19970129; EP 0755219 A4 19970514; JP H09511418 A 19971118
DOCDB simple family (application)
US 9500950 W 19950213; EP 95911574 A 19950213; JP 52514995 A 19950213