diff --git a/public/components/assistant.html b/public/components/assistant.html
index 3ccc7fc..1c2208e 100644
--- a/public/components/assistant.html
+++ b/public/components/assistant.html
@@ -124,6 +124,13 @@
 .assistant-side-body { padding:12px; display:grid; gap:10px; font-size:13px; }
 .assistant-visual-output { display:grid; gap:8px; }
 .assistant-visual-output img { width:100%; border-radius:10px; border:1px solid var(--g200); background:white; }
+.assistant-generated-image { display:grid; gap:8px; }
+.assistant-generated-image img { width:100%; border-radius:10px; border:1px solid var(--g200); background:white; }
+.assistant-image-actions { display:flex; gap:8px; flex-wrap:wrap; }
+.assistant-image-modal { position:fixed; inset:0; z-index:9999; background:rgba(15,23,42,.82); display:flex; align-items:center; justify-content:center; padding:24px; }
+.assistant-image-modal-card { position:relative; max-width:min(96vw,1200px); max-height:92vh; }
+.assistant-image-modal-card img { max-width:100%; max-height:92vh; border-radius:14px; background:white; box-shadow:0 24px 80px rgba(0,0,0,.35); }
+.assistant-image-modal-close { position:absolute; top:-12px; right:-12px; width:34px; height:34px; border:0; border-radius:999px; background:white; color:var(--g800); font-size:22px; line-height:1; cursor:pointer; box-shadow:var(--shadow); }
 .assistant-sources { padding:10px 12px; display:grid; gap:8px; max-height:520px; overflow-y:auto; }
 .assistant-source { border:1px solid var(--g200); border-radius:10px; padding:9px; background:white; font-size:12px; line-height:1.5; }
 .assistant-source strong { color:var(--g800); }
diff --git a/public/js/clinicalAssistant.js b/public/js/clinicalAssistant.js
index 900375c..5c286f5 100644
--- a/public/js/clinicalAssistant.js
+++ b/public/js/clinicalAssistant.js
@@ -12,6 +12,8 @@
   var lastSources = [];
   var mermaidReady = false;
   var dynamicExamples = [];
+  var generatedImages = {};
+  var generatedImageSeq = 0;
   var EMPTY_PROMPT_SETS = [
     [
       { label: 'Status asthma escalation', prompt: 'In a 4-year-old with acute wheeze, when should magnesium sulfate be considered and what dose is recommended?' },
@@ -62,6 +64,7 @@
     if (copyBtn) copyBtn.addEventListener('click', copyLastAnswer);
     if (exportBtn) exportBtn.addEventListener('click', exportAnswerPdf);
     if (imageBtn) imageBtn.addEventListener('click', generateImage);
+    document.addEventListener('click', onAssistantDocumentClick);
     if (input) input.addEventListener('keydown', function (e) {
       if ((e.ctrlKey || e.metaKey) && e.key === 'Enter') onAsk(e);
     });
@@ -365,10 +368,10 @@
       if (!data.success) throw new Error(data.error || 'Image generation failed');
       var src = data.imageUrl || data.url || (data.base64 ? ('data:image/png;base64,' + data.base64) : '');
       if (!src) throw new Error('No image returned');
-      if (out) out.innerHTML = '<img src="' + escapeAttr(src) + '" alt="Generated clinical visual"><a class="btn-sm btn-ghost" href="' + escapeAttr(src) + '" target="_blank" rel="noopener"><i class="fas fa-up-right-from-square"></i> Open</a>';
+      if (out) out.innerHTML = renderGeneratedImage(src, 'Generated clinical visual');
       if (fromChat) {
         setBusy(false, 'Ready');
-        var html = '<div class="assistant-generated-image"><img src="' + escapeAttr(src) + '" alt="Generated clinical visual"><a class="btn-sm btn-ghost" href="' + escapeAttr(src) + '" target="_blank" rel="noopener"><i class="fas fa-up-right-from-square"></i> Open image</a></div>';
+        var html = renderGeneratedImage(src, 'Generated clinical visual');
         replaceLoadingMessage(loading, html, [], [], true);
       }
     })
@@ -380,6 +383,42 @@
     });
   }
 
+  function renderGeneratedImage(src, alt) {
+    var id = 'img-' + (++generatedImageSeq);
+    generatedImages[id] = src;
+    return '<div class="assistant-generated-image"><img src="' + escapeAttr(src) + '" alt="' + escapeAttr(alt || 'Generated image') + '">' +
+      '<div class="assistant-image-actions">' +
+      '<button type="button" class="btn-sm btn-ghost" data-assistant-open-image="' + escapeAttr(id) + '"><i class="fas fa-expand"></i> Preview</button>' +
+      '<a class="btn-sm btn-ghost" href="' + escapeAttr(src) + '" download="clinical-visual.png"><i class="fas fa-download"></i> Download</a>' +
+      '</div></div>';
+  }
+
+  function onAssistantDocumentClick(e) {
+    var openBtn = e.target.closest('[data-assistant-open-image]');
+    if (openBtn) {
+      e.preventDefault();
+      openImagePreview(openBtn.getAttribute('data-assistant-open-image'));
+      return;
+    }
+    if (e.target.closest('.assistant-image-modal-close') || e.target.classList.contains('assistant-image-modal')) {
+      closeImagePreview();
+    }
+  }
+
+  function openImagePreview(id) {
+    var src = generatedImages[id];
+    if (!src) return;
+    closeImagePreview();
+    var modal = document.createElement('div');
+    modal.className = 'assistant-image-modal';
+    modal.innerHTML = '<div class="assistant-image-modal-card"><button type="button" class="assistant-image-modal-close" aria-label="Close">&times;</button><img src="' + escapeAttr(src) + '" alt="Generated clinical visual"></div>';
+    document.body.appendChild(modal);
+  }
+
+  function closeImagePreview() {
+    document.querySelectorAll('.assistant-image-modal').forEach(function (el) { el.remove(); });
+  }
+
   function buildContextualImagePrompt(request) {
     var prompt = String(request || '').trim();
     if (!lastAnswer) return prompt;