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All Journal Jurnal Ilmu Kedokteran dan Kesehatan KOLONI (Medical Scientific Journal) MESINA
Ni Putu Rita Jeniyanthi
AKTEK Radiodiagnostik dan radioterapi Bali
Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Dentistry Education Health Professions Immunology & microbiology Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Public Health Social Sciences Other

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Optimization of MRI Image Quality Through Slice Thickness Variations in AXIAL T2-Weighted Imaging Using Air™ RECON DL Ni Wayan Yuniarsih; Ni putu Rita Jeniyanthi; Dedy Rudy H Mantow
MESINA (Medical Scientific Journal) Vol 7, No 1 (2026): Medical Scientific Journal (MESINA)
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/msj.v7i1.11425

Abstract

Magnetic Resonance Imaging (MRI) is a diagnostic imaging modality with excellent soft-tissue contrast. MRI image quality is influenced by several acquisition parameters, including slice thickness. AIR™ Recon DL (Deep Learning Image Reconstruction) has been developed to improve image quality through noise reduction and deep learning-based reconstruction. This study aimed to analyze the effects of slice thickness variation and AIR™ Recon DL level on the image quality of axial T2-weighted sequences acquired on a 1.5-Tesla MRI system. A quantitative experimental design using a phantom study was employed. Slice thicknesses of 1 mm, 3 mm, and 5 mm were evaluated at four AIR™ Recon DL levels: Off, Low, Medium, and High. Image quality was assessed using Signal-to-Noise Ratio (SNR) and Contrast-to-Noise Ratio (CNR), measured with the Region of Interest (ROI) method. Data were analyzed using the Shapiro–Wilk test, Two-Way Repeated Measures ANOVA, and post hoc testing. The results demonstrated that slice thickness, AIR™ Recon DL level, and their interaction significantly affected both SNR and CNR (p<0.001). SNR increased with greater slice thickness and higher AIR™ Recon DL levels, with the highest value observed at 5 mm and the High level. In contrast, CNR tended to decrease as both parameters increased, and the highest CNR was obtained at 1 mm with AIR™ Recon DL Off. These findings indicate that AIR™ Recon DL can effectively improve signal quality; however, protocol optimization should maintain an appropriate balance among signal enhancement, noise reduction, partial-volume effects, and image contrast. The findings may support optimization and clinical studies.
Analisis Prosedur Pemeriksaan Mri Brain Pada Kasus Parese Cranial Nerve VI Dengan Sekuen 3D bSSFP: Studi Kasus Di Instalasi Radiologi Rs Di Daerah Jakarta Regitha Debiesga Prima; Ni Putu Rita Jeniyanthi
Jurnal Ilmu Kedokteran dan Kesehatan Vol 13, No 3 (2026): Volume 13 Nomor 3
Publisher : Prodi Kedokteran Fakultas Kedokteran Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jikk.v13i3.22701

Abstract

Parese CN VI merupakan kelumpuhan saraf kranialis keenam yang menyebabkan gangguan pergerakan bola mata dan penglihatan ganda. Penelitian ini bertujuan mendeskripsikan prosedur MRI Brain pada parese CN VI serta mengevaluasi peran 3D bSSFP (FIESTA) dalam visualisasi saraf dan deteksi kelainan. Metode penelitian ini kualitatif deskriptif dengan pendekatan studi kasus melibatkan satu pasien yang dilakukan pemeriksaan MRI Brain. Hasil penelitian menunjukkan persiapan pasien meliputi melepaskan benda logam, mengganti pakaian, screening medis, dan buang air kecil. Dan menggunakan MRI 1,5 T dengan head coil, body strap, spons/busa, selimut, dan emergency buzzer. Protokol pemeriksaan mencakup 3-plane localizer, Sagital T1 SE, Sagital T2, Coronal T2, Axial DWI b-value 1000, Axial T1, Axial T2 Propeller, Axial T2* GRE, Axial T2 FLAIR, dan Axial 3D bSSFP (FIESTA). Peran 3D bSSFP (FIESTA) untuk menilai jalur CN VI, mendeteksi kompresi saraf. Kesimpulan pemeriksaan MRI Brain pada parese CN VI dengan sekuen 3D bSSFP (FIESTA) meningkatkan visualisasi nervus abducens dan deteksi kelainan dibandingkan sekuen rutin.
Peranan T1-Weighted Post-Contrast dan Dynamic Susceptibility Contrast (DSC) Perfusion pada Pemeriksaan MRI Brain Pasien dengan Indikasi Klinis Epilepsi di Rumah Sakit Umum Pusat Surabaya Putu Amanda Prasaka Putri; Ni Putu Rita Jeniyanthi; Nur Salsabila Sandy
KOLONI Vol. 5 No. 3 (2026): SEPTEMBER 2026
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/koloni.v5i3.1402

Abstract

Epilepsy is a neurological disorder characterized by recurrent seizures caused by abnormal electrical activity in the brain and may be associated with structural or functional abnormalities. Magnetic resonance imaging (MRI) plays an important role in identifying the underlying causes of epilepsy and determining the need for additional imaging techniques. This study aimed to describe the role of T1-weighted post-contrast and Dynamic Susceptibility Contrast (DSC) perfusion in brain MRI examinations of patients with clinical indications of epilepsy at RSUP Surabaya. This study used a qualitative descriptive method with a multiple case study design involving three patients who underwent brain MRI examinations using a 1.5 Tesla Philips MRI scanner. Data were collected through image observation, examination documentation, radiology reports, and interviews with two radiographers and one radiologist. The results showed that T1-weighted post-contrast contributed to the evaluation of enhancement characteristics, particularly in a patient with a right temporal mass showing strong enhancement. In suspected mesial temporal sclerosis, the main findings were obtained from structural sequences, showing bilateral hippocampal FLAIR hyperintensity with right hippocampal atrophy without abnormal enhancement. DSC perfusion provided additional information regarding tissue perfusion, showing perfusion differences between the lesion and contralateral tissue in the mass case. This study concludes that T1-weighted post-contrast and DSC perfusion have complementary roles and can be selectively applied according to MRI findings and clinical needs in epilepsy patients.
Perbandingan Kualitas Citra Antara Sekuen T2 Weighted 3D VISTA Dengan T2 Weighted Turbo Spin Echo Pada Potongan Sagital Pemeriksaan MRI Lumbal Anggreini Ningsi Malo; Ketsya K. Titalouw; Ni Putu Rita Jeniyanthi
KOLONI Vol. 5 No. 3 (2026): SEPTEMBER 2026
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/koloni.v5i3.1432

Abstract

Optimal image quality is essential in MRI, and although T2-Weighted Turbo Spin Echo (T2W TSE) provides excellent tissue detail, its 5-mm slice thickness may limit the visualization of small anatomical structures, whereas T2-Weighted 3D VISTA, with 1-mm isotropic voxels, offers higher spatial resolution and multiplanar reconstruction; therefore, this quantitative comparative study aimed to compare the Signal-to-Noise Ratio (SNR) and Contrast-to-Noise Ratio (CNR) of T2W 3D VISTA and T2W TSE sequences in sagittal lumbar MRI using a Philips Achieva 1.5 Tesla MRI scanner, involving 15 patients examined with both sequences, with Regions of Interest (ROIs) placed on the spinal cord, spinous processes, cerebrospinal fluid, intervertebral discs, interspinous ligaments, and vertebral bodies, followed by statistical analysis using the Paired Samples T-Test and Wilcoxon Signed Rank Test. The results showed significant SNR differences in the vertebral bodies (p<0.001), spinous processes (p=0.022), intervertebral discs (p=0.002), and spinal cord (p=0.050), with T2W TSE generally demonstrating higher signal intensity, while no significant differences were found in CSF (p=0.491) or interspinous ligaments (p=0.256). CNR analysis revealed no significant differences between the two sequences across all anatomical structures (p>0.05), indicating comparable intertissue contrast. However, Wilcoxon mean rank analysis showed that T2W 3D VISTA tended to be superior for intervertebral discs, vertebral bodies, and spinous processes due to its higher spatial resolution, whereas T2W TSE tended to be superior for the spinal cord and interspinous ligaments due to its stronger signal intensity and contrast.
Co-Authors Anggreini Ningsi Malo Dedy Rudy H Mantow Ketsya K. Titalouw Ni Wayan Yuniarsih Nur Salsabila Sandy Putu Amanda Prasaka Putri Regitha Debiesga Prima