Analisis Variasi Slice Thickness Terhadap Informasi Anatomi Potongan Axial Pada Pemeriksaan MSCT Cervical Pada Kasus Trauma

Abstract

Background: One step to create a good image is by doing slice thickness reconstruction. Slice thickness is thick slices or pieces of the object checked out. The examination procedure of MSCT in case of Cervical trauma in Radiology Installation RSUD Tugurejo Semarang using slice thickness 3 mm. This contrasts with Seeram (2016), which explained that the examination of adult MSCT Cervical Spine using slice thickness between 1-2 mm. This research aims to know the difference of anatomic information resulted by 5 slice thickness variation in MSCT Cervical Spine and to find out which slice thickness can provide optimum anatomic information.Methods: The type of this research is quantitative with an experimental approach. Data is performed by reconstructing the 5 images of MSCT cervical of trauma patients using 5 slice thickness variation which is 1 mm, 1.5 mm, 2 mm, 2.5 mm and 3 mm. The final images are evaluated by two Respondents to see the differences in anatomic information and then analyzed by using a different test (Friedman Test) from the SPSS version 24.0.Results: The results showed there is a significant difference in anatomic information on the corpus, lamina, spinous process, transverse process and fragment fracture between variations in slice thickness of 1 mm, 1.5 mm, 2 mm, 2.5 mm, and 3 mm on the MSCT Cervical examination with a significance value of 0,000 or p 0.05.Conclusion: The most optimal slice thickness to provide anatomic information on the cervical MSCT examination is 1 mm slice thickness with a mean rank value of 3.64.

Studi Kualitatif: Analisis Informasi Anatomi Pada Variasi Slice Thickness MSCT Scan Orbita Dengan Media Kontras Potongan Axial MPR

“…Di sisi lain, noise pada citra juga meningkat akibat slice thickness yang semakin tipis dan mengakibatkan terjadinya peningkatan fluktuasi (standar deviasi) dari nilai CT number pada citra, sedangkan apabila menggunakan slice thickness tebal akan menghasilkan citra dengan detail yang rendah, sebaliknya, dengan slice thickness tipis maka detail yang dihasilkan pada anatomi citra MSCT orbita lebih tinggi. Apabila ketebalan pada slice thikness semakin tinggi akan mengakibatkan timbulnya gambaran yang menganggu (artefak) garis-garis, akan tetapi apabila terlalu tipis akan menimbulkan citra yang banyak noise atau tidak halus 6,7 .…”

“…Pemilihan tebal atau tipisnya ukuran slice thickness pada pemeriksaan CT scan tergantung pada aplikasi klinis dan objek yang dilakukan pemeriksaan. Misalnya pada pemeriksaan Ct Scan Orbita dengan menggunakan media kontras, penggunaan slice thickness yang tipis dapat memperlihatkan struktur atau bagian anatomi terkecil dan persarafan dari orbita maupun dapat mengetahui adanya patologi secara jelas 7,8 . Dari hasil penelitian, diantara nilai slice thickness 1 mm, 2 mm dan 3 mm dapat menghasilkan informasi citra anatomi CT scan orbita optimal yaitu pada slice thickness 2 mm.…”

Automated slice sensitivity profile measurement of the CT image of the AAPM CT performance phantom: Which stair object should be used?

“…The slice sensitivity pro le (SSP) of a computed tomography (CT) scanner represents the spatial resolution in the Z-direction [1], and its full width at half maximum (FWHM) corresponds to the effective slice thickness of the image [2][3][4]. The slice thickness of CT scanners has improved from 5 to 10 mm [5] down to sub millimeter thicknesses [6][7][8].…”