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  <!-- ============ PAGE HERO ============ -->
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      <nav class="breadcrumb" aria-label="Breadcrumb"><a href="index.html">Home</a> &nbsp;/&nbsp; fMRI Scanner</nav>
      <span class="kicker">Dartmouth Brain Imaging Center (DBIC)</span>
      <h1>The 3T fMRI Scanner</h1>
      <p class="lede">State-of-the-art functional neuroimaging on a Siemens MAGNETOM Prisma 3&nbsp;Tesla whole-body MRI system, supporting research across the Dartmouth community.</p>
      <span class="maintainer">Dartmouth Brain Imaging Center · Directed by Prof. Tor Wager · Open to Dartmouth &amp; external researchers</span>
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  <!-- ============ OVERVIEW SPLIT ============ -->
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          <span class="eyebrow">The scanner</span>
          <h2>Siemens MAGNETOM Prisma 3T</h2>
          <p class="prose" style="color:var(--text-soft)">The DBIC operates a state-of-the-art 3.0&nbsp;Tesla Siemens MAGNETOM Prisma whole-body MRI system, running on the Siemens XA60 software platform. Its homogeneous 3T magnet, high-performance XR&nbsp;80/200 gradient system, and Tim&nbsp;4G integrated-coil architecture deliver excellent B1 homogeneity and enable advanced capabilities such as simultaneous multi-slice acquisition.</p>
          <ul class="spec-list" style="margin-top:1.5rem;">
            <li><strong>Field strength:</strong> 3.0 Tesla, 60 cm bore</li>
            <li><strong>Gradients:</strong> 80 mT/m peak, 200 T/m/s slew rate (XR 80/200)</li>
            <li><strong>Homogeneity:</strong> 0.25 ppm over a 40 cm DSV</li>
            <li><strong>Platform:</strong> Siemens XA60; SMS/multiband &amp; multi-echo capable</li>
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            <img src="images/mri-scanner-prisma2.jpg" alt="Siemens MAGNETOM Prisma 3T scanner in the DBIC scan room" />
            <figcaption>The DBIC Siemens 3T Prisma, installed in Moore Hall (in use since August 2016).</figcaption>
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  <!-- ============ HEAD COILS ============ -->
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            <img src="images/mri-head-coils.png" alt="64-, 32-, and 20-channel head coils" />
            <figcaption>The three phased-array head coils: 64-, 32-, and 20-channel.</figcaption>
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          <span class="eyebrow">Head coils</span>
          <h2>Three phased-array coils</h2>
          <p class="prose" style="color:var(--text-soft)">The Tim 4G coil system supports parallel imaging and simultaneous multi-slice acquisition across three receiver coils, chosen to match each study's resolution, coverage, and head-size needs.</p>
          <div class="spec-table-wrap" style="margin-top:1.2rem;">
            <table class="spec-table">
              <thead><tr><th scope="col">Coil</th><th scope="col">Best for</th></tr></thead>
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                <tr><th scope="row">64-channel</th><td>Highest SNR &amp; iPAT/SMS performance; 40 of 64 channels in the head region</td></tr>
                <tr><th scope="row">32-channel</th><td>iPAT "no-tune" workhorse — parallel imaging &amp; multiband</td></tr>
                <tr><th scope="row">20-channel</th><td>Larger heads; older technology, not generally recommended</td></tr>
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  <!-- ============ SEQUENCES ============ -->
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        <span class="eyebrow" data-reveal>Imaging capabilities</span>
        <h2 data-reveal data-reveal-delay="1">Supported sequences</h2>
        <p class="lede" data-reveal data-reveal-delay="2">All sequences are customizable — adjust T1/T2, slice thickness, filters, and acceleration to fit your protocol.</p>
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          <div class="icon" aria-hidden="true">🧠</div>
          <h4>Structural</h4>
          <p>T1 MPRAGE, T2, and T2-FLAIR anatomical imaging with high isotropic resolution.</p>
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        <div class="feature" data-reveal data-reveal-delay="1">
          <div class="icon" aria-hidden="true">🌐</div>
          <h4>Diffusion (dMRI)</h4>
          <p>HARDI and multi-shell DWI for tractography and structural connectomics.</p>
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        <div class="feature" data-reveal data-reveal-delay="2">
          <div class="icon" aria-hidden="true">⚡</div>
          <h4>Functional BOLD</h4>
          <p>Single-band, multiband/SMS, and multi-echo. Standard: 2.7 mm isotropic in &lt;1.5 s/volume.</p>
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          <div class="icon" aria-hidden="true">🩸</div>
          <h4>Arterial Spin Labeling</h4>
          <p>Non-invasive perfusion imaging for quantitative cerebral blood flow.</p>
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          <div class="icon" aria-hidden="true">🔬</div>
          <h4>Spectroscopy</h4>
          <p>Multi-slice MRS (GABA, NAA, and other metabolites), including custom mega-press.</p>
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          <div class="icon" aria-hidden="true">🧭</div>
          <h4>Angiography</h4>
          <p>Time-of-flight angiography and field-mapping sequences.</p>
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  <!-- ============ PERIPHERALS ============ -->
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        <span class="eyebrow" data-reveal>In the scan room</span>
        <h2 data-reveal data-reveal-delay="1">Stimulus &amp; recording peripherals</h2>
        <p class="lede" data-reveal data-reveal-delay="2">A complete suite for delivering stimuli and recording behavior and physiology, synchronized to scanner acquisition.</p>
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      <div class="gallery">
        <figure class="contain" data-reveal><img src="images/peripheral-projector.png" alt="Panasonic DLP projector" /><figcaption><strong>Visual:</strong> Panasonic PT-DW750BU 7000-lumen DLP projector via waveguide.</figcaption></figure>
        <figure class="contain" data-reveal data-reveal-delay="1"><img src="images/peripheral-earphones.png" alt="Sensimetrics insert earphones" /><figcaption><strong>Auditory:</strong> Sensimetrics S14 insert earphones (~40 dB attenuation).</figcaption></figure>
        <figure class="contain" data-reveal data-reveal-delay="2"><img src="images/peripheral-response-interface.png" alt="Current Designs response interface" /><figcaption><strong>Response:</strong> Current Designs 932 interface — 4-button, 2×2, grip, trackball, joystick.</figcaption></figure>
        <figure class="contain" data-reveal><img src="images/peripheral-eyelink.png" alt="SR Research EyeLink 1000 Plus" /><figcaption><strong>Eyetracking:</strong> SR Research EyeLink 1000 Plus with in-bore mirror.</figcaption></figure>
        <figure class="contain" data-reveal data-reveal-delay="1"><img src="images/peripheral-biopac.png" alt="BIOPAC MP160 physiology system" /><figcaption><strong>Physiology:</strong> BIOPAC MP160 — skin conductance, pulse, respiration.</figcaption></figure>
        <figure class="contain" data-reveal data-reveal-delay="2"><img src="images/peripheral-button-4.png" alt="Four-button bimanual response handset" /><figcaption><strong>Handsets:</strong> optical fiber response devices for macOS &amp; Windows.</figcaption></figure>
      </div>
      <div class="callout" style="margin-top:2rem;" data-reveal><strong>Also available:</strong> MRIFocus corrective lenses, an Optoacoustics FOMRI III noise-cancelling microphone for verbal recording, and the ReproStim video-capture suite that archives all session stimuli.</div>
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  <!-- ============ QA ============ -->
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          <span class="eyebrow">Quality assurance</span>
          <h2>Weekly stability monitoring</h2>
          <p class="prose" style="color:var(--text-soft)">FBIRN QA metrics are generated weekly to monitor scanner stability — mean ghost percentage (threshold &lt;3%), signal-to-fluctuation-noise ratio (SFNR), and SNR — using a standardized fMRI protocol on an agar phantom with the 32- and 64-channel coils. Siemens coil-element checks run weekly for the head coil and monthly for the body coil.</p>
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          <figure><img src="images/qa-phantom.jpeg" alt="Agar QA phantom used for weekly scanner stability checks" /><figcaption>The agar phantom used for weekly FBIRN QA scans.</figcaption></figure>
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  <!-- ============ SCHEDULING & RATES ============ -->
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        <span class="eyebrow" data-reveal>Access</span>
        <h2 data-reveal data-reveal-delay="1">Scheduling &amp; rates</h2>
        <p class="lede" data-reveal data-reveal-delay="2">An approved DBIC protocol is required before booking. Scan requests are submitted to Courtney Rogers; all rates include MR tech support, data transfer, and archiving.</p>
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      <div class="spec-table-wrap" data-reveal style="background:#0d211a;border-color:rgba(255,255,255,.12);">
        <table class="spec-table" style="background:transparent;color:#eaf3ef;">
          <thead><tr><th scope="col" style="background:#0a1a14;color:var(--emerald-lite);">Rate tier</th><th scope="col" style="background:#0a1a14;color:var(--emerald-lite);">When</th><th scope="col" style="background:#0a1a14;color:var(--emerald-lite);">Cost</th></tr></thead>
          <tbody>
            <tr><td>Internal · Peak</td><td>Mon–Fri, 8 a.m.–4 p.m.</td><td>$500 / hour</td></tr>
            <tr><td>Internal · Off-peak</td><td>Weeknights after 4 p.m.; weekends</td><td>$400 / hour</td></tr>
            <tr><td>External</td><td>Non-Dartmouth-funded projects</td><td>$700 / hour</td></tr>
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      <p style="margin-top:1.2rem;color:rgba(233,242,238,.7);font-size:.9rem;" data-reveal>Among the most cost-effective research rates in the U.S. (typical centers charge $550–$850/hour). Off-peak sessions require a certified operator and scan buddy.</p>
      <div style="margin-top:1.6rem;" data-reveal>
        <a class="btn btn-primary btn-arrow" href="mailto:courtney.rogers@dartmouth.edu">Request scan time</a>
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  <!-- ============ DATA PIPELINE ============ -->
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            <img src="images/diagram-dbic-pipeline.png" alt="DBIC automated data processing pipeline" style="background:#fff;" />
            <figcaption>From scanner console to connectome: the DBIC automated pipeline.</figcaption>
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          <span class="eyebrow">Data processing</span>
          <h2>An automated analysis pipeline</h2>
          <p class="prose" style="color:var(--text-soft)">Every study collected at DBIC flows through a standardized, automated pipeline — BIDS conversion and DataLad versioning, preprocessing with fMRIPrep and FreeSurfer, automated quality control with MRIQC, and advanced analysis with CANlab tools. It interoperates with more than 50 BIDS apps.</p>
          <a class="btn btn-outline btn-arrow" href="pipeline.html" style="margin-top:.6rem;">Explore the pipeline</a>
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  <!-- ============ HISTORY / STAFF ============ -->
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      <span class="eyebrow" data-reveal>Heritage</span>
      <h2 data-reveal data-reveal-delay="1">A pioneering imaging center</h2>
      <p class="prose" data-reveal data-reveal-delay="2" style="color:var(--text-soft)">In 1999, Dartmouth became the first liberal-arts college in the country to own and operate an MRI machine strictly for research. The center opened with a 1.5T GE system, upgraded to a 3.0T Philips in 2004, and has operated its current Siemens 3T Prisma since August 2016. The DBIC is directed by Prof. Tor Wager and staffed by an MRI physicist, an MR technologist, a computer systems manager, and an administrative director.</p>
      <div class="callout" data-reveal><strong>Contact:</strong> Courtney Rogers · <a href="mailto:courtney.rogers@dartmouth.edu">courtney.rogers@dartmouth.edu</a> · Moore Hall, Hanover, NH.</div>
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