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I want to take you now through the scoring criteria

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for T two signal in the transitional zone,

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T two being the major criteria for their transitional zone

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or transition zone, not the DWI, which is the major criteria

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for the peripheral zone score.

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One, a normal appearing tz, which by the way is very rare

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or a round, completely encapsulated nodules.

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So-called typical nodule,

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and it's not uncommon to see these nodules extruded

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into the peripheral zone

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and you can connect them, uh,

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with your eye if you look carefully.

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It's also not uncommon for these nodules

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and those in the two

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and three score area

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to have marked diffusion restriction even

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though they're benign.

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And this can be a little bit confusing.

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Score number two, a mostly encapsulated nodule

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or a homogeneous circumscribed nodule

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without encapsulation.

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So-called atypical nodule,

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or a homogeneous mild hypo intense area between nodules,

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and I won't lie to you, determining the presence

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of encapsulation and its degree is a challenging process.

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Score three, heterogeneous signal intensity

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with obscured margins,

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and it doesn't fit into two, four, or five.

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Four, A lenticular

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or cur linear, almost like a half moon

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or quarter moon, non circumscribed, homogeneous,

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moderately hypo intense area,

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almost like you're smearing a little cream cheese on the

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edge of a bagel and less than five,

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1.5 centimeters in greatest dimension.

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Five, exactly the same as four,

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but the dimension is greater than

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or equal to 1.5 centimeters.

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The T two weighted image

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or the T two signal is the major criteria along

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with its shape for the transitional zone, not the DWI.

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Let's move on, shall we?