A NOVEL AUTOMATED THREE-DIMENSIONAL FRAMEWORK FOR EVALUATING ALPHA ANGLE IN FEMUR

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Gharenazifam Mina; Arbabi Ehsan

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Seminar Paper

Paper Information

Seminar: IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING
Year:2012 | Issue:19

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Title

A NOVEL AUTOMATED THREE-DIMENSIONAL FRAMEWORK FOR EVALUATING ALPHA ANGLE IN FEMUR

Author(s)

Gharenazifam Mina | Arbabi Ehsan

Keywords

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Abstract

FEMOROACETABULAR IMPINGEMENT (FAI) IS CONSIDERED AS ONE OF THE MAIN CAUSES OF EARLY OSTEOARTHRITIS OF THE HIP. CAM IMPINGEMENT IS FEMORAL CAUSE OF FAI, WHICH REFERS TO A SITUATION WHERE THE FEMORAL HEAD LOSES ITS SPHERICAL SHAPE AT HEAD-NECK JUNCTION. THIS ANATOMIC DEFORMITY COULD BE REFLECTED BY THE ALPHA ANGLE. IN THIS ARTICLE WE PROPOSE A NEW FULLY AUTOMATED FRAMEWORK FOR MEASURING ALPHA ANGLE USING 3D DATA, WITHOUT ANY NEED OF MANUAL CONFIGURATION. THIS APPROACH PROVIDES ALPHA ANGLES IN DIFFERENT ORIENTATIONS, BY ROTATING A RADIAL PLANE AROUND THE FEMORAL HEAD-NECK AXIS. THIS HELPS TO HAVE AN ILLUSTRATION OF ALPHA ANGLE AS A CONTINUOUS CURVE. THE METHOD HAS BEEN TESTED ON 12 FEMUR 3D DATASETS (6 LEFT+6 RIGHT), RECONSTRUCTED FROM MR IMAGES OF DIFFERENT FEMALE SUBJECTS WITHOUT ANY REPORTED FEMORAL ABNORMALITIES. THE MEAN AND STANDARD DEVIATION VALUES OF ALPHA ANGLE ARE ABOUT 36.9° AND 1.1° RESPECTIVELY, WHICH ARE IN GOOD AGREEMENT WITH THE EXPECTED VALUES FOR ALPHA ANGLE. IN ADDITION, FOUR DIFFERENT RESOLUTIONS OF 3D MESHES HAVE BEEN EXAMINED BY THE PROPOSED METHOD. THE EFFECT OF THE RESOLUTION ON THE PROVIDED RESULTS HAS BEEN EVALUATED (IN TERMS OF ACCURACY AND SPEED).

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APA: Copy

Gharenazifam, Mina, & Arbabi, Ehsan. (2012). A NOVEL AUTOMATED THREE-DIMENSIONAL FRAMEWORK FOR EVALUATING ALPHA ANGLE IN FEMUR. IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. SID. https://sid.ir/paper/926041/en

Vancouver: Copy

Gharenazifam Mina, Arbabi Ehsan. A NOVEL AUTOMATED THREE-DIMENSIONAL FRAMEWORK FOR EVALUATING ALPHA ANGLE IN FEMUR. 2012. Available from: https://sid.ir/paper/926041/en

IEEE: Copy

Mina Gharenazifam, and Ehsan Arbabi, “A NOVEL AUTOMATED THREE-DIMENSIONAL FRAMEWORK FOR EVALUATING ALPHA ANGLE IN FEMUR,” presented at the IRANIAN CONFERENCE ON BIOMEDICAL ENGINEERING. 2012, [Online]. Available: https://sid.ir/paper/926041/en

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