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IMF-075-03-0001-en	Why should a structure be followed across contiguous slices rather than identified on one image?	Its shape changes as the plane intersects different levels, so a curved vessel may appear as a circle, an oval, or an elongated tube.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0002-en	How can partial-volume averaging mislead image interpretation?	It combines different tissues within one voxel, which can obscure small lesions or create an intermediate density.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0003-en	Why does projection matter when judging heart size on a chest radiograph?	A posteroanterior image reduces cardiac magnification compared with an anteroposterior portable image, so apparent heart size depends on the view.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0004-en	How does the silhouette sign localise disease on a chest radiograph?	Loss of the border between two structures of similar density indicates adjacent disease: a lost right heart border suggests right middle-lobe opacity, a lost hemidiaphragm a lower lobe.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0005-en	Why can a CT finding be invisible on one window yet evident on another?	Window width sets the displayed attenuation range and window level its centre, so lung, soft-tissue, brain, and bone windows reveal different structures from the same data.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0006-en	Why may non-contrast CT be essential before iodinated contrast is given?	Contrast increases attenuation where it distributes, so haemorrhage, calcification, stones, or baseline density may need to be assessed before it is given.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0007-en	What distinguishes deterministic tissue reactions from stochastic cancer risk after ionising radiation?	Deterministic reactions have thresholds and increase in severity with dose, whereas stochastic cancer risk is modelled as an increasing probability.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0008-en	Why is the apparent diffusion coefficient map reviewed alongside diffusion-weighted images?	Bright diffusion-weighted signal may be T2 shine-through, and the map helps distinguish it from true restriction of water motion.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0009-en	Why can gadolinium enhancement neither confirm nor exclude malignancy?	Enhancement shows vascularity or blood-tissue barrier disruption through shortened relaxation, which does not equal malignancy, and absent enhancement does not exclude it.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0010-en	Why can a tendon or nerve look falsely dark on ultrasound?	Anisotropy: when the beam is not perpendicular to the tendon or nerve, it appears falsely dark.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0011-en	Why does red on colour Doppler not by itself mean an artery?	Colour displays direction and relative velocity according to the colour map, not intrinsically red artery and blue vein.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0012-en	Why is increased tracer uptake in nuclear imaging not synonymous with cancer?	Uptake reflects transport, metabolism, receptor binding, perfusion, or turnover depending on the agent, so inflammation, healing, and normal high-metabolism tissues also accumulate tracer.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0013-en	Why is radiological detection of an incidental finding not completed care?	The finding still needs risk-based follow-up and a responsible clinician to act on it.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending
IMF-075-03-0014-en	Why must an imaging finding be judged against symptoms and examination rather than on appearance alone?	Severe disease can be occult early and striking age-related changes can be asymptomatic, so the question is whether the finding anatomically and physiologically explains the presentation.	Integrated Medical Foundations; chapter 75, TTS module 3; https://theisegoria.github.io/medical-textbook/integrated-medical-foundations-expanded-english.md; module SHA256 at export: a2615ac5997d7aab83c798d79cdced7d1b7263db651bee0a5433cef7f241b1a9; editorial review pending	imf lang::en chapter::075 module::075-03 review::pending