How to View CT Scans on iPhone & iPad in 2026

CT (Computed Tomography) scans generate hundreds or thousands of DICOM slices that traditionally require a desktop PACS workstation to review. But with modern iOS apps like MedScan, you can now open, navigate, and analyze full CT studies directly on your iPhone or iPad — completely offline, with no cloud uploads.

What You Need

• iPhone or iPad running iOS 17 or later
• CT scan files in DICOM format (.dcm) — from your hospital, imaging center, or DICOM CD
• MedScan app — free on the App Store

Step 1: Get Your DICOM Files

Most imaging centers provide scans on a DICOM CD or via a patient portal. Common formats include individual .dcm files, ZIP archives, or folder structures. MedScan handles all of these — including corrupted ZIP files from Google Drive exports.

You can transfer files to your iPhone via AirDrop, email attachments, iCloud Drive, Google Drive, or any cloud storage app.

Step 2: Open in MedScan

Tap the import button in MedScan and select your files. The app uses a two-phase parsing system: it first discovers all DICOM files in the folder structure, then parses them in parallel. A 500-slice CT study loads in under 3 seconds.

MedScan automatically detects the modality (CT, CBCT, MRI, etc.) and configures the appropriate viewing tools and window/level presets.

Step 3: Navigate Slices

Swipe up/down to scroll through axial slices. Pinch to zoom, drag to pan. Double-tap for fullscreen. The gesture system supports simultaneous multi-gesture input — you can adjust window/level while scrolling.

Step 4: MPR Reconstruction (Pro)

Switch to multi-panel mode to view axial, sagittal, and coronal planes simultaneously. MedScan supports 1×1, 2×1, 1×2, and 2×2 layouts with synchronized scrolling and cross-reference lines between panels.

Step 5: Measure & Annotate (Pro)

Use the ruler tool for linear measurements and the angle tool for angular measurements. Both tools feature a 3× loupe magnifier for sub-millimeter precision. ROI (Region of Interest) statistics show mean, min, max, and standard deviation of Hounsfield Unit values.

Step 6: AI Analysis (Pro)

Tap the Analyze button on any slice to get an instant AI-powered report. The AI identifies anatomical structures, highlights potential findings, and provides a structured summary. You can ask follow-up questions in natural language. Only the current slice image is sent for analysis — never the full study.

Supported CT Transfer Syntaxes

MedScan supports all standard DICOM transfer syntaxes used in CT imaging, including Implicit VR Little Endian, Explicit VR, JPEG baseline, JPEG 2000, JPEG-LS, and RLE Lossless. Built with DCMTK 3.6.8 and OpenJPEG 2.5.0 for maximum compatibility.

Privacy & Security

All DICOM processing happens locally on your device. No data is uploaded to any server. No account registration is required. MedScan is designed with HIPAA compliance in mind — your patient data never leaves your iPhone or iPad.