Automatic validation of the gantry tilt in a computed tomography scanner using a head polymethyl methacrylate phantom

被引:1
作者
Noviliawati, Rakhma [1 ]
Anam, Choirul [1 ]
Sutanto, Heri [1 ]
Dougherty, Geoff [2 ]
Mak'ruf, Muhammad Ridha [3 ]
机构
[1] Diponegoro Univ, Fac Sci & Math, Dept Phys, Jl Prof Soedarto SH, Semarang 50275, Central Java, Indonesia
[2] Calif State Univ Channel Isl, Dept Appl Phys & Med Imaging, Camarillo, CA 93012 USA
[3] Poltekkes Kemenkes, Dept Electromed Engn, Surabaya, East Java, Indonesia
来源
POLISH JOURNAL OF MEDICAL PHYSICS AND ENGINEERING | 2021年 / 27卷 / 01期
关键词
computed tomography; gantry tilt; polymethyl methacrylate phantom; automated method; quality control; LENS;
D O I
10.2478/pjmpe-2021-0008
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
The purpose of this study was to develop an automatic method for validating the computed tomography gantry tilt. A head polymethyl methacrylate phantom with a diameter of 16 cm was used. Gantry tilt angles were measured both manually and automatically. Manual measurements were performed by measuring the length of the anteroposterior and lateral diameters from acquired images using electronic calipers. Automatic measurements consisted of a number of steps: phantom segmentation, determination of the center of the phantom, measurement of the anteroposterior and lateral diameters, and computation of the gantry tilt angle. The method was implemented on the gantry angles from 0 degrees to 15 degrees. The proposed method of measuring gantry angles produced accurate gantry tilt angles. The differences with the angles displayed on the gantry were less than 1 degrees. The results of the automatic method were the same as those of the manual method (R-2 > 0.98).
引用
收藏
页码:57 / 62
页数:6
相关论文
共 23 条
  • [1] Abou-Elenein HS., 2013, CHINESE GERMAN J CLI, V12, P237, DOI [10.1007/s10330-012-1133-3, DOI 10.1007/S10330-012-1133-3]
  • [2] Ali STM, 2013, SUDAN MED MONIT, V8, P159, DOI [10.4103/1858-5000.132611, DOI 10.4103/1858-5000.132611]
  • [3] American Association of Physicists in Medicine, 1993, 39 AAPM
  • [4] The impact of head miscentering on the eye lens dose in CT scanning: Phantoms study
    Anam, C.
    Fujibuchi, T.
    Toyoda, T.
    Sato, N.
    Haryanto, F.
    Widita, R.
    Arif, I.
    Dougherty, G.
    [J]. 7TH ASIAN PHYSICS SYMPOSIUM, 2019, 1204
  • [5] A fully automated calculation of size-specific dose estimates (SSDE) in thoracic and head CT examinations
    Anam, C.
    Haryanto, F.
    Widita, R.
    Arif, I.
    Dougherty, G.
    [J]. 13TH SOUTH-EAST ASIAN CONGRESS OF MEDICAL PHYSICS 2015 (SEACOMP), 2016, 694
  • [6] Anam C., 2015, ADV SCI ENG MED, V7, P892, DOI DOI 10.1166/ASEM.2015.1780
  • [7] An evaluation of computed tomography dose index measurements using a pencil ionisation chamber and small detectors
    Anam, Choirul
    Fujibuchi, Toshioh
    Haryanto, Freddy
    Widita, Rena
    Arif, Idam
    Dougherty, Geoff
    [J]. JOURNAL OF RADIOLOGICAL PROTECTION, 2019, 39 (01) : 112 - 124
  • [8] Automated Calculation of Water-equivalent Diameter (DW) Based on AAPM Task Group 220
    Anam, Choirul
    Haryanto, Freddy
    Widita, Rena
    Arif, Idam
    Dougherty, Geoff
    [J]. JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS, 2016, 17 (04): : 320 - 333
  • [9] Tilting the gantry for CT-guided spine procedures
    Boulter, Daniel J.
    Rumboldt, Zoran
    Bonaldi, Giuseppe
    Muto, Mario
    Cianfoni, Alessandro
    [J]. RADIOLOGIA MEDICA, 2014, 119 (10): : 750 - 757
  • [10] Diagnostic X-Ray Imaging Committee, 1993, 39 AAPM AM I PHYS I