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A short guide, frequently asked questions and every shortcut.

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Getting started

Board Review contains the book's 29 chapters, the Quick Review Tables, 1,719 questions and 10 mixed exams. No sign-up is needed.

Your progress (answers, review list, notes, highlights) is kept only in this browser. On a phone you can add the site to your home screen (see Settings) and use "Download the whole book" to read offline.

Settings →

Modules and the diagnostic test

Each chapter starts with learning objectives and study modules. A module is a 30–60 minute part of the chapter made of consecutive headings: "Read" takes you to that heading, "Answer the questions" opens only the questions linked to those headings. Your progress in this browser is shown next to each module; the order of the text does not change.

If you are not sure where to start, take the diagnostic test in Board Review: it asks two questions from every chapter and suggests a study order with the chapters you found hardest at the top. Times are estimates.

On a second pass through a chapter, use "Key points only" above the text: the running text is hidden; the most frequently asked box, tip boxes, tables, figures and the end-of-chapter summary stay. "Full text" brings everything back.

Tip cards (Board Review → Cards) turn the board tip boxes of the text into question → answer cards: say the answer to yourself, turn the card, choose "I knew it" or "I missed it". A card you missed comes back tomorrow, a card you knew after 3, 7, 14 and 30 days. The "Tip cards" link on a chapter page opens only that chapter's cards.

Diagnostic test →

AI and Claude

The platform's AI is Claude, used in two ways: inside the site (no Claude account needed, the platform pays) or optionally from your own Claude app through the connector (your subscription pays).

Today dictation, voice commands and ready phrases work without AI. Reports from free speech, the "Ask Claude" panel and the connector are in preparation.

Full explanation →

Studying every day

"Start today's session" on the Board Review page gives you the questions due for review plus new questions up to your daily goal in one session. You can change the goal (20-150 questions) and your exam date on the same page; with an exam date you see the days left and the questions needed per day.

Consecutive study days count as a streak. Missing a day resets the streak, not your progress.

Study →

Spaced review

Every question you get wrong enters the review list and comes back the next day. Correct answers in review stretch the interval to 3, 7, 14 and 30 days; after the fifth correct answer the question leaves the list. A wrong answer in review starts it over.

The "Review" badge in the top bar shows how many questions are due today.

Review →

Mock exams

The 10 mixed exams on the Board Review page are the book's mock exams: choose a time limit (60/100/150 min or untimed), move with the question grid, and get results by chapter with explanations for your mistakes.

On the Study page you can build a mixed test or timed mock exam from the chapters you choose (all, unanswered, wrong or flagged questions).

Build a mixed test →

While reading

The number next to a heading opens the questions linked to it. If you came to a topic from a question with "Read the topic", "Back to the question" (bottom left) returns you to it.

Select text and press "Highlight"; tap a highlight to remove it. All highlights are in the "Highlights" tab of the Flagged page.

"Aa" in the top bar changes theme (light, sepia, dark), text size and animation stage (match theme, dark, light); the sun/moon button in an animation's bottom strip also switches the stage. On a computer « hides the contents on the left.

Flagged, notes and highlights →

Animations

Most figures are step-by-step animations. Space or the ⏸/▶ button in the strip below pauses or resumes; animations with a time axis have a bar to jump to any moment. Double-click the drawing to enlarge it. The speed setting (0.5×-1.5×) applies to all animations.

Under each animation you find "Test yourself" questions, a source line and feedback buttons. All gestures are listed below.

Keeping and moving your progress

Clearing browser data or using a private window loses your progress. "Export" in Settings copies your progress as text; "Import" merges it in another browser or device. The same text can be pasted into the earlier personal app.

With membership, progress will sync across devices automatically.

Settings and progress transfer →

Tools

Statistics shows the last 14 days, your score by chapter and your exam history. Key points gathers the "Key Points for the Board" items from chapter ends, with a shuffled review mode. The dose calculators are for education only.

Dose calculators →

Visual glossary: symbols and colours

Each particle is drawn the same way in every animation and figure, following the established convention of textbooks and Feynman diagrams.

Particle and event symbols

Photon (γ, X-ray): Wavy line with an arrowhead. Bremsstrahlung and 511 keV annihilation photons are drawn the same way.
Visible light: Scintillation light: a more loosely wavy orange arrow (low energy, long wavelength).
Electron (e⁻): Purple dot. β⁻ particle, photoelectron, Compton and Auger electron; its track is a purple line.
Positron (e⁺): Red dot; once it stops it annihilates with an electron.
Neutrino (ν, ν̄): Dashed grey arrow; it barely interacts with matter.
Nucleus / atom: In the element's own colour (CPK/Jmol colours used in chemistry), size proportional to the mass number (radius ∝ A^1/3); name inside. Example: F-18 and Ga-68.
Alpha particle: Cluster of 2 protons (red) + 2 neutrons (grey).
Absorption: Point where the photon or particle is stopped (absorbed).
LOR: Line of response: a conceptual line joining two detectors, not a photon (straight line).

Anatomy colours

The same structure has the same colour in every figure and animation. The border of each swatch is that structure's outline colour. Grey tones and tracer orange in scintigraphic images show activity, not anatomy.

Artery#c0392b
Vein#2f5f9e
Capillary#8e4f8f
Blood in the lumen#f9e2df
Tubule, urinary tract#f3dc8f
Bowman's space#fffbea
Trunk, soft tissue#f6ebe3
Lung#f3e4e1
Heart#e8b4ae
Liver#b6806c
Bone#eceff3
Lymphatic vessel#5b8f4e
Lymph node#d7e8cc
Skin#f0d7c4
Subcutaneous fat#fbefd2
Thyroid#e9c39b
Renal parenchyma#c9806a
Spleen#a8576a

Material colours

Shielding and phantom materials. Plexiglass was chosen so that it cannot be confused with photon navy or electron purple (also under colour-blindness simulation).

Plexiglass, acrylic#dcefe6
Lead#8a8f98
Water, paraffin#dbe9f6
Paper#f4ead2

Element colours

Atoms and nuclei use the standard chemistry colours (CPK/Jmol); the radionuclide name is written inside or beside the nucleus, and nuclear size scales with the cube root of the mass number. Element colours are never made transparent.

Frequently asked questions

Are the site's AI and Claude different things?

No. The site's AI is Claude. Using it inside the site needs no Claude account; using it from your own Claude app is optional.

Do I need an account?

No. All content is currently open without sign-up; progress is kept in this browser.

Will my progress move to my phone?

For now, through the export / import text in Settings. With membership it will sync automatically.

I found an error.

Use "Feedback" at the bottom left; the page and chapter are added automatically. Medical corrections are made after editorial review and listed on the "What's new" page.

Where do the values come from?

The text is based on guidelines (EANM, SNMMI, ICRP and others); numerical values were checked one by one against reliable sources. Animations and calculators show a source line. Each chapter shows its last review date.

Can I use the calculators for patients?

No. The calculators and all tools are for education only; follow your institution's protocol and current guidelines for clinical decisions.

An animation is too fast or too slow.

Use the speed setting under the animation (0.5× to 1.5×); it applies to all animations. If "reduce motion" is on in your device, animations start paused.

When will English content be available?

Once the medical review of the Turkish content is finished, the whole book, questions and figures will be translated at once. Until then English pages show the Turkish text.

Does it work offline?

Yes. "Download the whole book" in Settings saves all chapters, questions and figures to the device (~34 MB).

Gestures and shortcuts

Every gesture does the same thing everywhere on the site. The rules are few and consistent so you don't need a manual.

Animations

Space or the ⏸/▶ button: Pause or resume (clicking the drawing does not pause)
Time bar below the drawing: Play/pause button; click or drag the bar to jump to that moment; ← → seek while the bar is focused; the current moment is shown on the right (e.g. t = 23 h)
Hover over a graph: The drawing shows that moment
Click a moment on the graph: Plays from there (Space or ⏸ to pause)
Drag the graph (finger on phones): Moves back and forth in time
← → after touching the graph: Seek: short press steps, hold to seek continuously; Shift for bigger steps; Home/End to start/end
← → after touching a step button: Change steps (swipe on phones)
Double-click the drawing: Enlarge; Esc or × closes
Items that glow on hover: Selectable: click, or focus and press Enter
Speed: The 0.5×–1.5× choice applies to every animation

Questions and exams

A–E or 1–5: Pick an option; in a mock exam, change your answer
← → · J / K · Enter: Previous / next question: single-question view, Study, Review and mock exams. In the list view and in Flagged, J / K scroll to the next and previous question
F or the flag icon: Flag the question; if you remove a flag you can undo within 5 s
N or the pencil icon: Open your personal note
Swipe sideways on a phone: In the single-question view: left for the next question, right for the previous one
Single question / List: Switch the view of chapter questions; the question you were on is remembered
Question grid: Shows correct, wrong and flagged questions; tap a number to go to that question
Manage progress: At the bottom of Statistics and in Settings: reset one chapter, wrong answers, the review list, exams or everything separately; a backup is made first and you can undo within 5 s
Space / Enter · 1 · 2 (Cards): Shows the answer on a tip card; 1 missed, 2 knew it; Esc leaves the session
Cards from my wrong answers (Cards page): Questions you answered wrongly become cards: stem on the front, correct option and explanation on the back; space reveals, 1 didn't know, 2 knew it

Reading

← →: Previous / next chapter (when no animation is selected)
Shift + ← →: Changes chapter anywhere; on question pages, the previous / next chapter's questions
Hold ↑ ↓: Scrolls the page; speeds up the longer you hold
Shift + ↑ ↓: Previous / next heading
g, then a chapter number: On Board pages, goes to that chapter (e.g. g 1 3 → Chapter 13)
Swipe sideways on a phone: At the top or end of a chapter: left for next, right for previous
Aa (top bar): Theme (light, sepia, dark) and text size
« (contents): Hide or show the contents on the left
Coming back to a chapter: "Back to where you left off" appears at the bottom
Tap a figure: Enlarge
Test yourself (end of a section): Opens up to three questions on that section in place; your answers count towards your progress
References such as see 8.5: Click to go to the referenced section; use the browser back button to return

General

?: Open this shortcut list
Esc: Close the open window
← Back (top of the page): Returns to the previous page where you left off; if you opened the page directly it goes to the parent page (e.g. Tools)
TR / EN (top bar): Change the language; you stay on the same page and at the same place. Also in Settings
Home page animation: Changes on every visit; pick one with "Another animation" or the dots under the drawing
Feedback (bottom left): Send an error or suggestion; you can dictate it