Sobat Radiology

Gambaran Umum - Perbandingan Alat Pencitraan Radiologi

SIMPOSIUM RADIOGRAFER NTB 2025 &
MUSDA PARI NTB KE-V

📅 30 November 2025
📍 Mataram

💳 Registrasi:
• *Free Registrasi* untuk Radiografer NTB
• Registrasi melalui Link: https://bit.ly/simposiumparintb
• Batas Waktu Pendaftaran *Minggu, 9 November 2025*

🎯 Peserta: Radiographer Level 5 & 6
Pastikan kompetensi di Satu Sehat sudah tertulis Radiografer level 5 (D3) atau level 6 (D4)

📲 Info:
• Mira 0818-0587-4429
• Anis 0877-5403-0583

Essential uses of MRI sequences!

Magnetic Resonance Imaging (MRI) utilizes two primary sequences: T1-weighted (T1) and T2-weighted (T2). T1 MRI highlights anatomy, provides crisp images, and shows fluids as dark. Conversely, T2 MRI focuses on pathology, making fluids bright, which is ideal for visualizing inflammation, edema, and certain lesions. The distinction between T1 and T2 is crucial for accurate medical diagnosis. In essence, while T1 outlines structures, T2 detects abnormalities. The choice between T1 and T2 depends on the clinical query and the body part being examined. Understanding these fundamental MRI sequences is vital for radiographers, radiologists, and clinicians to ensure the right imaging method is chosen for accurate diagnosis.

T1-weighted imaging emphasizes the differences in the longitudinal relaxation times (T1) of tissues. The contrast on T1WI is determined by the rate at which excited protons return to their equilibrium state, which is influenced by the tissue environment. Specifically, the contrast is produced by adjusting the repetition time (TR) and echo time (TE). For T1-weighted images, a short TR(400-600ms) and short TE(10-20ms) are utilized.

In T1WI, the image typically shows fat as bright (or hyperintense) and water or fluid-filled areas as dark (or hypointense). Therefore, anatomical structures with a high fat content, such as adipose tissue, will appear brighter on T1-weighted images, while fluid-filled structures, like the ventricles of the brain and spinal canal containing cerebrospinal fluid (CSF), will appear dark. Other fluid-filled areas, such as joints with synovial fluid, the bladder in the pelvis, the gallbladder, common bile duct, and ureters in the abdomen, will also appear dark in T1-weighted images.

T2-weighted imaging emphasizes the differences in the transverse relaxation times (T2) of tissues. The contrast on T2WI is determined by the rate at which excited protons lose phase coherence due to interactions with their surroundings. The image contrast in T2WI is produced by adjusting the TR and TE. For T2-weighted images, a long TR(3000-6000ms) and long TE(90-110ms) are used.