A fluoroscopy-based system for measuring intraoperative acetabular cup anteversion during total hip arthroplasty utilizing a direct anterior approach, the system comprising: a computing device configured with a processor and non-transitory processor readable memory that includes programming code that, when executed, configures the processor to: (a) process an anterior posterior image of a pelvis that includes a positioned acetabular cup, to measure an abduction angle of the acetabular cup, wherein the anterior posterior image is taken by a fluoroscopy image capture device configured with a C-arm; (b) process an external pelvic oblique image that includes the acetabular cup and that is taken by the fluoroscopy image capture device and positioned relative to an equatorial plane of the acetabular cup to detect whether a plane of the image amplifier is positioned perpendicular to the equatorial plane of the acetabular cup; (c) where the plane of the image amplifier of the fluoroscopy image capture is detected to be not positioned perpendicular to the equatorial plane of the acetabular cup: (c-i) transmit an instruction to move the C-arm to a different position and in a direction away from a hip of a patient that is being replaced with an implant including the acetabular cup; (c-ii) process a subsequently captured external pelvic oblique image that includes the acetabular cup and that is taken by the fluoroscopy image capture device to detect whether the plane of the image amplifier is positioned perpendicular to the equatorial plane of the acetabular cup; and (c-iii) repeat steps (a) - (d); and (d) where the plane of the image amplifier of the fluoroscopy image capture device is detected to be positioned perpendicular to the equatorial plane of the acetabular cup: (d-i) record a C-arm tilt angle when the C-arm is in a position in which the plane of the image amplifier is perpendicular to the equatorial plane of the acetabular cup; (d-ii) calculate an anteversion angle based on the measured abduction angle and the recorded C-arm tilt angle; (d-iii) determine whether the calculated anteversion angle is within a predetermined acceptable range; and (d-iv) where the calculated anteversion angle is outside of the predetermined acceptable angle, repeat steps (a) - (d) until the calculated anteversion angle is within the predetermined acceptable range. (a) process an anterior posterior image of a pelvis that includes a positioned acetabular cup, to measure an abduction angle of the acetabular cup, wherein the anterior posterior image is taken by a fluoroscopy image capture device configured with a C-arm; (b) process an external pelvic oblique image that includes the acetabular cup and that is taken by the fluoroscopy image capture device and positioned relative to an equatorial plane of the acetabular cup to detect whether a plane of the image amplifier is positioned perpendicular to the equatorial plane of the acetabular cup; (c) where the plane of the image amplifier of the fluoroscopy image capture is detected to be not positioned perpendicular to the equatorial plane of the acetabular cup: (c-i) transmit an instruction to move the C-arm to a different position and in a direction away from a hip of a patient that is being replaced with an implant including the acetabular cup; (c-ii) process a subsequently captured external pelvic oblique image that includes the acetabular cup and that is taken by the fluoroscopy image capture device to detect whether the plane of the image amplifier is positioned perpendicular to the equatorial plane of the acetabular cup; and (c-iii) repeat steps (a) - (d); and (c-i) transmit an instruction to move the C-arm to a different position and in a direction away from a hip of a patient that is being replaced with an implant including the acetabular cup; (c-ii) process a subsequently captured external pelvic oblique image that includes the acetabular cup and that is taken by the fluoroscopy image capture device to detect whether the plane of the image amplifier is positioned perpendicular to the equatorial plane of the acetabular cup; and (c-iii) repeat steps (a) - (d); and (d) where the plane of the image amplifier of the fluoroscopy image capture device is detected to be positioned perpendicular to the equatorial plane of the acetabular cup: (d-i) record a C-arm tilt angle when the C-arm is in a position in which the plane of the image amplifier is perpendicular to the equatorial plane of the acetabular cup; (d-ii) calculate an anteversion angle based on the measured abduction angle and the recorded C-arm tilt angle; (d-iii) determine whether the calculated anteversion angle is within a predetermined acceptable range; and (d-iv) where the calculated anteversion angle is outside of the predetermined acceptable angle, repeat steps (a) - (d) until the calculated anteversion angle is within the predetermined acceptable range. (d-i) record a C-arm tilt angle when the C-arm is in a position in which the plane of the image amplifier is perpendicular to the equatorial plane of the acetabular cup; (d-ii) calculate an anteversion angle based on the measured abduction angle and the recorded C-arm tilt angle; (d-iii) determine whether the calculated anteversion angle is within a predetermined acceptable range; and (d-iv) where the calculated anteversion angle is outside of the predetermined acceptable angle, repeat steps (a) - (d) until the calculated anteversion angle is within the predetermined acceptable range.