Article Figures & Data
Figures
- Fig 1.
A and B, Axial CISS (A) and postcontrast T1WI (B) of the left ear in a patient with Koos stage 3 VS. C and D, The follow-up imaging with CISS (C) and postcontrast T1WI (D) performed 1 year later demonstrates interval growth of the lesion with new brain stem compression (arrow), consistent with progression to Koos stage 4. Note that loss of internal heterogeneity is less well appreciated on the CISS sequence (C) than on the postcontrast image (D).
- Fig 2.
A and B, Koos stage 2 VS on the axial CISS image (A) and postcontrast T1WI (B). C and D, The follow-up imaging reveals minimal progression of the lesion with increased protrusion into the cerebellopontine cistern, both on the CISS (C) and postcontrast T1WI (D).
- Fig 3.
A−C, Postoperative MR imaging of a patient with right-sided VS. The axial T1WI (A), postcontrast T1WI (B), and CISS (C) image demonstrate postoperative changes on the right and a small residual lesion (arrow) within the cerebellopontine angle. D−F, The residual mass (arrow) is stable in the follow-up T1WI (D), postcontrast T1WI (E), and CISS imaging (F) performed 2 years later.
- Fig 4.
Imaging appearance of a Koos stage 4 VS treated with CyberKnife. The CISS image (A) and postcontrast T1WI (B) demonstrate a large heterogeneous mass compressing the brain stem. The CISS image (C) and postcontrast T1WI (D) of the follow-up study reveal an interval increase in the size of the mass. The increased internal heterogeneity is not well reflected in the CISS image (C).
Tables
Patient Age (yr)/Sex Clinical History Koos Stage No. of Studies Follow-Up Interval (Months) Progression (Observer 1) Progression (Observer 2) 1 71/F Hearing loss 1 4 50 – – 2 78/F Hearing loss 2 2 26 – – 3 51/F Hearing loss 1 4 43 – – 4 59/F Follow-up after surgery 2 4 42 – – 5 58/F Hearing loss 2 5 30 – – 6 31/F Hearing loss 2 6 55 + – 7 54/F Follow-up after CK 4 2 6 + – 8 50/F Hearing loss 1 3 14 – – 9 62/M Hearing loss 1 2 8 – – 10 25/F Hearing loss 1 2 7 – – 11 71/M Hearing loss 4 2 12 – – 12 70/F Hearing loss 2 2 12 – – 13 70/F Follow-up after surgery 2 2 24 – – 14 57/M Hearing loss 2 2 24 + + 15 66/M Hearing loss 2 2 6 – – 16 28/M Hearing loss 3 2 12 + + 17 59/M Hearing loss 1 2 14 – – 18 34/M Hearing loss 1 2 24 + – Note:—+ indicates increase in size; –, no progression; CK, CyberKnife.
Measurements Mean (mm) SD P Value Observer 1 CISS AP 8.0 6.5 .048 Post Gad AP 8.2 6.7 CISS TRA 10.5 5.1 .123 Post Gad TRA 10.8 5.1 CISS SI 7.1 5.6 .007 Post Gad SI 7.6 6.3 Observer 2 CISS AP 7.5 5.9 .030 Post Gad AP 7.8 6.4 CISS TRA 10.8 5.1 .214 Post Gad TRA 10.5 4.8 CISS SI 6.9 5.1 .983 Post Gad SI 6.9 5.7 Note:—Post Gad indicates postcontrast; CISS, constructive interference in steady state; AP, anteroposterior diameter; TRA, transverse diameter; SI, superoinferior diameter.
Measurements Mean (mm) SD P Value CISS AP .009 Observer 1 8.0 6.5 Observer 2 7.5 5.9 TRA .244 Observer 1 10.5 5.1 Observer 2 10.8 5.1 SI .602 Observer 1 7.18 5.6 Observer 2 7.0 5.3 Post Gad AP .009 Observer 1 8.2 6.7 Observer 2 7.8 6.4 TRA .067 Observer 1 10.8 5.1 Observer 2 10.5 4.8 SI .011 Observer 1 7.4 6.2 Observer 2 6.9 5.7
In this issue
Jump to section
Related Articles
Cited By...
- Noncontrast MRI Surveillance of Craniopharyngiomas Using a Balanced Steady-state Free Precession (bSSFP) Sequence
- Balanced Steady-State Free Precession Sequence (CISS/FIESTA/3D Driven Equilibrium Radiofrequency Reset Pulse) Increases the Diagnostic Yield for Spinal Drop Metastases in Children with Brain Tumors