Capsular wall and internal septae of the lesion are isointense on T1-weighted image and hypointense on T2-weighted image
; marginally contrast enhancement seen on fat-saturated contrast enhanced T1-weighted image (c).
(d) Plain sagittal T2-weighted image
of the abdomen revealed an oval-shaped mass with homogenous, mildly high intensity inside the right psoas major muscle (white arrow).
The lesion was isointense relative to muscle on the T1-weighted image and hyperin tense on the T2-weighted image
with a swirled appearance [Figure 1].
Coronal (a) and sagittal (b) non-saturated proton density- weighted images, and axial T2-weighted image
(c) show a multifibrillar structure, isointense to muscle in all sequences, in the expected location of the medial patellofemoral ligament, compatible with a supernumerary medial patellofemoral muscle.
Besides, hyper-intensity signal of C3-T2 level of spinal cord in T2-weighted image
, and hypo- to isointense in T1-weighted image also noted [Figure 1].
On the T1-weighted image, the tumour showed homogeneous signal intensity equal to that of muscle; on the T2-weighted image
, it had heterogeneous, low signal intensity with crack-like high-intensity lesions (Fig.
The selected images are images where the examination occurs during the relaxation took place, such as T1-weighted image and T2-weighted image
Crues et al (9) suggests that "It]he knee must be scanned in the axial, coronal and sagittal planes using thin sections (3 to 5 mm thick) with a combination of T1- and T2-weighted techniques, including at least one T2-weighted image
with fat suppression." Likewise, Bontrager (10) discusses the value of some of these sequences.
An MRI performed 2 weeks after treatment started indicated enhancement in the lesion on T2-weighted image
and fluid-attenuated inversion recovery images had disappeared (Figure, panel D).
Sagittal view of the heterogeneous isointense mass of the T1-weighted image (a), heterogeneous hyperintense mass of the T2-weighted image
(b), and enhanced mass of the fat-suppression image by short-T1 inversion recovery (STIR) (c).
Coronal T2-weighted image
(b) reveals a round hypointense lesion at the location of interventricular foramen of Monro (arrow in (b)).
The tunica albuginea is seen around the testis as a thin, hypointense rim on both T1 and T2 pulse sequences, better defined on T2-weighted image